口语学习

来看一下权威的解释

Under the weather:

If you say that you are under the weather, you mean that you feel slightly ill.

形容某人身体不舒服。

关于这个俚语的来源，据说是很多人容易受天气影响，关节等部位会不舒服，从而由"under the influence of weather"演变成"under the weather"。