studying. They will be in a bad health. It's also not good for studies. In my , it's important give students enough time to do outdoor activities. Then they will enjoy better health and work . So please pay more attention to health and growth.

1.此处表转折关系。

2.此处用被动关系。

3.spend some time on sth.在......上花费时间。

4.what引导的宾语从句，作studying的宾语。

5.in bad health "健康状况差"中间不用冠词。

6.此处指"全体学生们"。

7.此处用单数。

8.构成It is important to do sth.固定句型。动词不定式做真正的主语。

9.与前面better构成比较级的并列形式。

10.此处应用名词所有格作定语。