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今天,科学老师让我们回家好好理解一下“热胀冷缩”这个词的意思。中午我回到家里,问妈妈“热胀冷缩”是什么意思。妈妈笑了笑说:“我先做个实验,你看了以后自然就会明白了。”我点了点头,表示赞成。只见妈妈拿来一个乒乓球和一杯刚刚烧开的沸水,放到我的面前,让我看一下道具有没有问题。随后,她用手使劲一摁,一下子就把乒乓球摁扁了。我不解地问:“妈妈,你在干什么呀?为什么要把乒乓球摁扁了?”可妈妈一句话也不说,真不明白
Today, science teachers let us go home and understand the meaning of the term “thermal expansion and contraction.” At noon I went back home and asked Mom what it meant. Mom smiled and said: “I’ll be the first experiment, after you read it will naturally understand. ” I nodded in agreement. I saw my mother brought a table tennis and a cup of boiling water just boiled, put in front of me, let me look at the props have no problem. Subsequently, she struggled with a hand, suddenly put ping pong flattened. I puzzled to ask: “Mom, what are you doing? Why should the ping pong flat?” "Mom can not say a word, I really do not understand