问题描述：
They spend too much time studying,which lead to the serious problem that is lack of sleeping .
They feel tired as a result of lack of exercising.
这两个句子对吗?麻烦分析一下,然后请一下更好的修改句子
They feel tired as a result of lack of exercising.
这两个句子对吗?麻烦分析一下,然后请一下更好的修改句子
问题解答：
我来补答展开全文阅读