Under the Weather.

身体不适

It means not feeling well.

该短语的意思是身体不适、生病

He's feeling under the weather today so he can't join soccer practice.

他今天觉得身体不舒服，因此不能参加足球训练了

My boss is feeling under the weather and couldn't join the meeting.

我的老板身体微恙，无法参加会议

I'm feeling under the weather today so I can't make it to school.

我今天生病了，不能去学校了