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英検1級要約テクノロジー

政府、企業、銀行、その他多くの組織は、機密情報やオンライン取引を保護するために、現代の暗号技術に大きく依存しています。

Governments, businesses, banks, and many other organizations rely on modern encryption to protect confidential information and online transactions. These systems make intercepted data extremely difficult to read without the correct digital keys. However, researchers expect that sufficiently powerful quantum computers could eventually solve some mathematical problems much faster than today's machines. If that happens, several widely used encryption methods may no longer provide adequate protection. Data that is secure under current standards could then become vulnerable, even if the information was collected or transmitted years earlier.

90〜110語 · プリントあり

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英検1級要約環境

窒素肥料は、作物の成長を助け、収穫量を増やすことができるため、農地で広く使用されています。

Nitrogen fertilizers are widely used on farmland because they help crops grow and can increase yields. However, plants do not absorb all of the nutrients that farmers apply. When more nitrogen is added than crops can use, some of it remains in the soil and can be carried away by rain. Water moving across fields or through the ground may then transport this excess nitrogen into rivers, lakes, and coastal waters. As a result, areas far from the original farmland can receive unusually high levels of nutrients, especially after heavy rainfall or during seasons when fields are left bare.

90〜110語 · プリントあり

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英検1級要約環境

果物、苗木、木材など、大量の植物由来製品が毎日国境を越えて取引されています。

Large quantities of plant-based products, including fruit, young plants, and timber, are traded across national borders every day. This commerce supports agriculture and construction, but it can also move unwanted organisms from one region to another. Insects, eggs, fungi, or other pathogens may remain hidden on plants, packaging, or wood during transport. If they survive the journey and enter a place where they were previously absent, they may establish new populations. Because international trade connects distant ecosystems more quickly than natural movement would, even a small number of contaminated shipments can create opportunities for agricultural pests to spread.

90〜110語 · プリントあり

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英検1級要約環境

石油や天然ガスの井戸は、生産が終了した後にそのまま放置されることがあります。

Oil and natural-gas wells are sometimes left behind after production ends, especially when operators close businesses or abandon sites without completing proper sealing work. Thousands of these old wells exist in some producing regions, and their condition can deteriorate over time. Casings, valves, and other equipment may corrode, while gaps can develop around the well structure. When this happens, gases trapped underground, including methane, can move upward and escape at the surface. Because many abandoned wells are no longer regularly inspected, leaks may continue for long periods before anyone notices them.

90〜110語 · プリントあり

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英検1級要約健康・生活

医薬品が高価な地域や、正規の流通網が十分に整っていない地域では、多くの人が非公式の販売業者や規制されていない市場から薬を入手しています。

In regions where medicines are expensive or official distribution networks are weak, many people obtain drugs from informal sellers or unregulated markets. These channels can improve access when pharmacies and clinics are difficult to reach, but they also make it easier for counterfeit products to enter circulation. Such medicines may contain too little of the intended active ingredient, the wrong substance, or no effective medicine at all. Because packaging can closely resemble legitimate products, patients and even health workers may find it difficult to recognize that a drug is unsafe or ineffective before it is used, especially when reliable testing is unavailable.

90〜110語 · プリントあり

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英検1級要約環境

山火事が長年にわたって積極的に抑えられてきた地域では、森林に乾燥した落ち葉、枯れ枝、その他の燃えやすい物質が徐々に大量に蓄積することがあります。

In regions where wildfires have been aggressively suppressed for many years, forests can gradually accumulate large amounts of dry leaves, dead branches, and other flammable material. Preventing small fires may protect communities in the short term, but it also allows this fuel to build up on the forest floor. During prolonged dry periods, a single ignition can then spread quickly through the abundant vegetation. Strong winds and low humidity can make the situation worse, turning what might once have been a limited fire into a much larger and more intense wildfire that is difficult to control.

90〜110語 · プリントあり

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英検1級要約健康・生活

マラリアなど蚊が媒介する感染症は、世界の多くの地域で依然として深刻な健康問題を引き起こしています。

Mosquito-borne diseases such as malaria continue to cause serious health problems in many parts of the world. Governments and health organizations have long relied on insecticides, mosquito nets, and other control measures to reduce transmission. These approaches can save lives, but they do not always keep mosquito populations low enough to prevent outbreaks. In addition, repeated use of the same chemicals can favor mosquitoes that survive exposure, allowing resistance to spread through local populations. As control becomes less effective, communities may face continuing transmission even when substantial resources are devoted to conventional methods.

90〜110語 · プリントあり

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英検1級要約環境

寒冷地域では、冬の間、道路の凍結を防ぎ交通事故を減らすために、塩化物を主成分とする融雪剤が大量に散布されます。

In cold regions, large quantities of chloride-based deicing salts are spread on roads during winter to prevent ice from forming and reduce traffic accidents. These materials are effective and relatively inexpensive, which makes them widely used by local authorities. However, the salt does not remain on the road. When snow melts or rain falls, dissolved chloride can be washed into nearby streams, lakes, and groundwater. Because chloride breaks down very slowly, repeated winter applications can cause concentrations to build up over many years, especially in areas with heavy road traffic and limited water circulation. Pollution can therefore continue even outside the winter season.

90〜110語 · プリントあり

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英検1級要約教育・学校

農村部や遠隔地では、学校が有資格の教員を長期間にわたって採用・確保することに苦労する場合がよくあります。

In rural and remote areas, schools often struggle to recruit and retain qualified teachers for long periods. Smaller populations can mean fewer professional opportunities, while housing, transportation, and access to services may be less convenient than in cities. Teachers may also worry that working far from major educational centers will limit their career development. When vacancies remain unfilled, existing staff may be asked to teach subjects outside their main area of expertise, and some schools may be unable to offer specialized courses at all. This can leave administrators relying on temporary staff or repeatedly searching for replacements.

90〜110語 · プリントあり

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英検1級要約環境

地熱発電は、地下に蓄えられた熱を利用して電気を生み出すもので、天候に左右されずに稼働できる低炭素エネルギー源として注目されています。

Geothermal power uses heat stored beneath the ground to generate electricity and has attracted attention as a low-carbon source that can operate regardless of weather conditions. In some projects, however, operators inject water deep underground or pump hot fluids back to the surface. These activities can change pressure within rock formations and nearby faults. In certain regions, the resulting stress changes have triggered earthquakes that would otherwise have been unlikely to occur at that time or place. Most such events are small, but the possibility of stronger shaking has raised concerns around some geothermal developments.

90〜110語 · プリントあり

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英検1級要約社会・文化

公費で雇われる弁護士は、私選弁護士を雇う余裕のない被告人の権利を守るうえで重要な役割を果たしています。

Publicly funded lawyers play an important role in protecting defendants who cannot afford private legal representation. In many countries and regions, these attorneys are assigned to represent people facing criminal charges so that lack of money does not prevent access to legal assistance. However, public defenders often handle many cases at the same time. When workloads become too heavy, lawyers may have limited time to investigate evidence, interview witnesses, study legal issues, or meet privately with each client before important hearings and trials.

90〜110語 · プリントあり

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英検1級要約環境

乾燥地域では、作物を安定して生産するのに十分な降雨がないため、農家は灌漑に頼ることがよくあります。

In dry regions, farmers often depend on irrigation because rainfall is too limited to support reliable crop production. Irrigation water naturally contains small amounts of dissolved salts, and repeated use can gradually change the condition of the soil. When water applied to fields evaporates or is taken up by plants, much of the salt remains behind. If this process continues for many years, salt concentrations can rise to levels that damage crops. The problem is especially serious where drainage is poor, since salts cannot easily move away from the root zone.

90〜110語 · プリントあり

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英検1級要約社会・文化

一部の国では、悪天候、国際紛争、その他の混乱によって食料輸入が不安定になる可能性があるため、政府が主要穀物の備蓄を維持しています。

Governments in some countries maintain reserves of major grains because food imports can become unreliable during periods of bad weather, international conflict, or other disruptions. Nations that depend heavily on overseas suppliers may be especially vulnerable when transport routes are interrupted or exporting countries restrict sales. By purchasing grain during normal periods and storing it in public facilities, authorities can create an emergency supply that can be used when commercial markets fail to provide enough food.

90〜110語 · プリントあり

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英検1級要約環境

大規模な商業漁業では、魚介類を効率よく大量に捕獲するために、網、釣り糸、その他の漁具が使用されます。

Large-scale commercial fishing uses nets, lines, and other gear designed to catch large quantities of seafood efficiently. These methods help supply global markets, but they do not always capture only the intended species. Seabirds, sea turtles, marine mammals, and non-target fish can become trapped or hooked accidentally while vessels pursue commercially valuable catches. Some of these animals are released alive, but many are injured or die before they can escape. Because bycatch occurs during normal fishing operations, large numbers of unintended animals may be affected even when fishers are following legal practices.

90〜110語 · プリントあり

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英検1級要約テクノロジー

世界の広い地域に高速インターネットなどのサービスを提供するため、何千もの小型衛星が地球低軌道に投入されています。

Thousands of small satellites are being placed into low Earth orbit to provide services such as high-speed internet to large parts of the world. Because these satellites travel relatively close to Earth, they can appear bright when they reflect sunlight, especially shortly after sunset or before sunrise. As the number of satellites increases, more of them may pass through the field of view of ground-based telescopes. Their movement can leave bright streaks across astronomical images, sometimes covering parts of the sky that scientists are trying to study.

90〜110語 · プリントあり

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英検1級要約環境

漁網、わな、その他の漁具は、嵐、事故、設備の故障などによって海で失われることがあります。

Fishing nets, traps, and other gear are sometimes lost at sea because of storms, accidents, or equipment failure. Once separated from their owners, these items may continue functioning for months or even years. Fish, seabirds, turtles, and other marine animals can become trapped in abandoned gear even though no fisher is present to collect the catch. Because the equipment is no longer being monitored, animals that are caught may die and remain inside, attracting additional creatures and allowing the cycle to continue. This unintended capture is commonly known as ghost fishing.

90〜110語 · プリントあり

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英検1級要約環境

魚介類への需要の高まりを背景に、沿岸海域や河川では大規模な魚類養殖が拡大しています。

Growing demand for seafood has encouraged the expansion of large-scale fish farming in coastal waters and rivers. Aquaculture can provide a stable supply of fish without relying entirely on wild stocks, but farms must keep large numbers of animals within cages, ponds, or other enclosed facilities. Storms, floods, or structural failures can damage these systems and allow farmed fish to escape into surrounding waters. Once outside, they may spread over wide areas and come into contact with wild populations that evolved under local environmental conditions.

90〜110語 · プリントあり

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英検1級要約環境

人工照明は、安全や経済活動を支えるため、都市、道路沿い、商業地域などで夜間に広く使用されています。

Artificial lighting is widely used at night in cities, along roads, and around commercial areas to support safety and economic activity. Streetlights, illuminated signs, and building lights can help people travel and work after dark, but much of this light is stronger than necessary or directed where it is not needed. Light that shines upward or spreads beyond its intended area can brighten the night sky over a wide region. As urban areas expand, places that once experienced natural darkness may remain illuminated throughout the night, changing environmental conditions that many species have depended on for generations.

90〜110語 · プリントあり

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英検1級要約健康・生活

現代の食品は、消費者の手に届くまでに、長く複雑な国際的サプライチェーンを通ることがよくあります。

Modern food products often pass through long and complex international supply chains before reaching consumers. Ingredients may be grown, processed, blended, and packaged in several different countries, making it difficult for buyers to know exactly where each component came from or what it contains. This lack of visibility can create opportunities for food fraud. Producers or suppliers seeking higher profits may substitute cheaper ingredients for more expensive ones or add undeclared substances while continuing to sell the product under its original label. These practices may be difficult to detect through appearance alone.

90〜110語 · プリントあり

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英検1級要約環境

気温の上昇や生活水準の向上に伴い、エアコンや冷蔵設備は世界中でますます普及しています。

Air conditioners and refrigeration systems are becoming more common around the world as temperatures rise and living standards improve. These technologies help people remain comfortable and protect food, medicines, and other products that require cooling. However, many cooling systems depend on chemical refrigerants that can escape during normal use, maintenance, or disposal. Some of these substances have a much stronger warming effect than carbon dioxide when released into the atmosphere. Although only relatively small amounts may leak from each unit, the rapid growth in cooling equipment means that total emissions could become increasingly important.

90〜110語 · プリントあり

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英検1級要約健康・生活

航空需要の増加により、大都市の近くにある多くの空港では、早朝や深夜にも航空便が運航されるようになっています。

Growing demand for air travel has led many airports near major cities to operate flights early in the morning and late at night. Extending operating hours can help airlines use aircraft more efficiently and provide passengers with a wider range of departure and arrival times. However, airports are often surrounded by residential areas, and people living nearby may be exposed repeatedly to the sound of aircraft taking off and landing. Noise can be especially disruptive at night, when even brief periods of loud sound may interrupt sleep.

90〜110語 · プリントあり

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英検1級要約環境

大規模な衣料品生産では、さまざまな色の生地を作るために、大量の水や化学物質を必要とすることがよくあります。

Large-scale clothing production often requires substantial amounts of water and chemicals to create fabrics in many different colors. During dyeing, water is used to carry pigments and other substances through the material, and large volumes of wastewater are produced afterward. If this wastewater is discharged without adequate treatment, dyes and other chemicals can enter nearby rivers and gradually accumulate in the aquatic environment. Because some of these substances break down slowly, pollution may persist even after a factory reduces its discharges.

90〜110語 · プリントあり

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英検1級要約テクノロジー

子どもたちは、動画、交流機能、ゲーム、その他のデジタルサービスを提供するオンラインプラットフォームで、ますます多くの時間を過ごすようになっています。

Children are spending increasing amounts of time on online platforms that offer videos, social interaction, games, and other digital services. Many of these services include material or features that are not suitable for younger users, so companies often set minimum-age requirements. However, these rules are frequently based on users simply entering their date of birth or confirming that they are old enough. Because such information is easy to falsify, children may gain access to services or functions that were intended only for older users.

90〜110語 · プリントあり

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英検1級要約環境

道路網の拡大によって、かつてつながっていた森林や草原が、より小さく孤立した地域へと分断されています。

Expanding road networks are dividing forests and grasslands that were once connected into smaller and more isolated areas. Highways can form major barriers for wildlife because animals often need to move between habitats to find food, water, or breeding partners. When they attempt to cross busy roads, they may be struck by vehicles. Some species instead avoid roads completely, reducing the area they can use and limiting access to important resources. As development continues, these effects can separate animal populations that previously interacted more freely.

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