单词：white witriol
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一、文章及段落起始常用的过渡词语 to begin with 首先 【例】To begin with, smoking should be banned in public areas. 首先，在公共场合应该禁烟。 first of all 第一，首先 【例】First of all, many people in remote
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It started with a simple experiment: take some graphite - the black stuff in the middle of a pencil - and put a piece of tape over it. When the scientists at the University of Manchester did that, they found that they could develop a material that co
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