They spend too much time studying,which lead to the serious problem that is lack of sleeping .
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
答
正确.无需修改.尤其第一个,已经很复杂,并且也很棒了.