单词:air-core cable
un. 空气纸绝缘电缆
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Broadcast: February 14, 2003 By George Grow This is the VOA Special English Environment Report. President Bush has offered a plan to speed development of technology that uses hydrogen as fuel. His goa
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This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? The Apollo moon missions ended almost 40 years ago. But for lunar scientists, they're gifts that keep on giving. Researchers studying rocks brought back by ast
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North Korea conducted a 'successful' hydrogen bomb test, Pyongyang has confirmed. The thermonuclear weapon triggered a massive 5.1 magnitude earthquake when it exploded at 10am local time on Wednesday. 平壤方面已经证实,朝鲜成功的进行了
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