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2025年3月6日「モバイル英語学習」第869号 (英語のエッセイ): The Future of Quantum Computing

Vocabulary
quantum – 量子;
mechanics – 力学;
septillion – 10垓（がい）; 10の24乗（非常に大きな数）;
Nvidia – エヌビディア; 世界的な半導体企業で、特にGPU（グラフィックス処理装置）で有名;
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Quantum computing is a new technology that uses quantum mechanics to solve very difficult problems. It is much more powerful than regular computers. For example, Google showed a quantum chip that solved a problem in just five minutes, while the world’s fastest supercomputer would take 10 septillion years to do the same task.

However, quantum computers are not ready for everyday use yet. They are very expensive and difficult to build. Scientists need to improve both the hardware and software before they become useful.

Experts have different ideas about when quantum computers will be ready. Some believe we will see 5,000 quantum computers by 2030, but useful ones may not come until 2035 or later. Nvidia’s CEO thinks they will be ready in 2045, but Microsoft believes they may come much sooner.

Quantum computing is growing fast, but we still need time before it becomes part of our daily lives.
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2025年3月1日「モバイル英語学習」第868号 (英語のエッセイ): Secrets of the Ancient Underground City

Notes:
storage – 保管, 収納;
stables – 厩舎, 馬小屋;
shaft – 軸, 柄, 通風孔, 縦穴;
torch – 松明, 懐中電灯；
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A man in Turkey discovered an ancient underground city called Derinkuyu. This 2,000-year-old city could hold more than 20,000 people and is connected to over 200 smaller underground cities through tunnels.

The city has two levels. The upper level was used for storage, stables, and keeping the area warm. The lower level had homes, meeting rooms, and a school.

Derinkuyu is famous for its advanced air and water systems. Over 50 shafts brought fresh air throughout the city, but living conditions were still difficult. People lived in small spaces and used torches for light.

The city was forgotten after Christians left the area in 1923. It was rediscovered in 1963 when a man found a hidden tunnel while chasing his chickens. Today, Derinkuyu is a symbol of the impressive engineering and survival skills of ancient people.
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