be under the weather

Feeling under the weather may be a result of overindulgence.

心情不好可能是过度放纵造成的.

be/ feel under the weather have a splitting headache When i study i have a splitting headache!

生病；觉得不舒服头痛欲裂我学习的时候头特别痛！

Therefore, rigid jointless track laying must be carried out under specific thermal conditions to avoid dangerous tensile and compressive stress in the rails during extreme weather.

因此在铺设无缝线路时，钢轨温度需要保持在一定的范围内，以避免恶劣气候条件下钢轨内部产生的拉伸应力对其产生的损害。

Signboards shall be made of such materials capable to last the full lifecycle under all weather conditions at site.

布告板的材料要在现场天气环境下也能持续一个周期。

The team sent the cars out only making the final adjustment to prepare for the qualifying session which should be under the same weather condition.

车队发出了所有的赛车，并收集数据为其做最后的调教，以便能够在排位赛中适应同样的天气。