问题描述：
关于that is这个用法的问题.
ECT4的作文范文里面有这样一句话
“children who are paid for doing housework will get into the habit of doing nothing for free,that is ,they will become profit-oriented.”
请问插入语that is有什么意义?
ECT4的作文范文里面有这样一句话
“children who are paid for doing housework will get into the habit of doing nothing for free,that is ,they will become profit-oriented.”
请问插入语that is有什么意义?
问题解答：
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