so that's great that a lot of people have enough time to be in something that's not math or science related.

很多人投入了时间，来做与数学或科学无关的事情，这真的太好了。

积极参与俱乐部活动 - SpeakingMax英语口语达人

No, I don't have enough time to exercise.

我一向来都不运动，因为我没有足够的时间。

Do you ever实战 - SpeakingMax英语口语达人