单词：neodymium-iron-boron magnet
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说一口流利的英语，从简单的单词开始。 听听，读读，背背，今天你的词汇量又增加了5个。 单词/词义 中英例句 单词听读 kiss [ kis ] A soft wind kissed the tr
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EDUCATION REPORT -August 8, 2002: Magnet Schools By Jerilyn Watson This is the VOA Special English Education Report. Many American students attend public schools called magnet schools. They are called
教育与新闻
AUDIE CORNISH, HOST: Each year, malaria kills about half a million people around the world. Health officials say a fast, cheap, accurate way to test for malarial infection would be extremely helpful in combating the disease. As NPR science correspond
2018年NPR美国国家公共电台5月
Radiation causes damage at the most fundamental level. It mutates the blueprint of life, DNA. Earth's magnetosphere is our crucial defense. It's so fundamental to our evolution and continued existence that the race is on to understand why it's changi
自然百科2011年
Easily confused by this idea, there has a big thawed iron inner core, so that I think it's just the bar magnet, just permanent magnet frozen in nad, and that's where causes all the magnetic field. But it's too hot inside the Earth, that can't happen
自然百科2011年
今天我们要学的词是magnet。 Magnet, 吸铁石，引伸为有吸引力的人或物。英国石油公司同意设立一个200亿美元的基金，赔偿石油泄露事件的受害者。有专家警告说， The $20 billion relief fund will be
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