热涨冷缩

Teacher: We all know that heat causes an object to expand an cold cauese it to contract. Now, can anyone give me a good example?John: Well, in the summer the days are long, and in the winter the days are short.老师:我们都知道热胀冷缩的道理。现在,谁给我举个例子?约翰:嗯,在夏天天都长,在冬天天都短。来自:VOA英语网 文章地址: http://www.tingvoa.com/html/20160807/373035.html

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