单词：bscco superconductor
铋 锶 钙 铜 氧超导体
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Semiconductors, or microchips, have been changing the way the world works for the past half-century. The technology has made radios, televisions and mobile devices commonplace. In advancing the technology, researchers are now focusing on superconduct
发表于:2018-12-02 / 阅读(143) / 评论(0)
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MARY LOUISE KELLY, HOST: We've been reporting a lot on the U.S. threat to impose tariffs on some $150 billion worth of goods imported from China. Beijing is promising to retaliate. One big source of tension is that the Trump administration says for t
发表于:2019-01-16 / 阅读(105) / 评论(0)
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