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In his lifetime, Hutton patented 244 inventions.
出自-2013年12月听力原文
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He becomes an inventor and sells his inventions in order to attend the university.
出自-2013年6月听力原文
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with the benefit of hindsight, it looks like the Internet will transform the economy at something like the pace of other great inventions like electricity.
2019年6月六级真题（第一套）阅读 Section B