词汇早知道:
heat(热) cause (引起) object (物体)
contract(收缩) expand(膨胀)
Teacher : We all know that heat causes an object to expand and cold causes 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,那么现在,谁能给我举个例子呢?
约翰:嗯,夏天白天长,冬天白天短。
小贴士
contract作名词时,常见意思是“合同”,而作动词时,也有“收缩”之意
( ͡o ͜ʖ ͡o)我可以学
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