问题描述:
帮忙分析一下这句英文句子
When heated ,the metal expands,and if allowed to cool it will contract
HEATED为什么不能改称being heated
allowed 为什么这么用 allowing呢?
When heated ,the metal expands,and if allowed to cool it will contract
HEATED为什么不能改称being heated
allowed 为什么这么用 allowing呢?
问题解答:
我来补答展开全文阅读