单词：nonrusting steel
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This is the VOA Special English Education Report. A high school student in Pennsylvania works on a math question Recently we asked how you feel about calculators in school. We heard from about thirty people in twelve countries, including a large num
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And his fancy equipment did in fact come in very handy. For years, he and Madame Lavoisier occupied themselves with extremely exacting studies requiring the finest measurements. They determined, for instance, that a rusting object doesn't lose weight
万物简史
Lesson 13 THE METAL CALLED IRON 第十三课 一种叫铁的金属 Iron is the most useful of all metals. Hammers, nails, grates, horse-shoes, railings, bridges, and many other things are made of iron. 在所有金属里面, 铁是最有用的一种。
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英语新闻
Why Stainless Steel Does Not Rust But Other Metals Do? 不锈钢（Stainless Steel）指耐空气、蒸汽、水等弱腐蚀介质和酸、碱、盐等化学浸蚀性介质腐蚀的钢，又称不锈耐酸钢。实际应用中，常将耐弱腐蚀介质
英语听力文摘 English Digest