to cloud over
[phrase form: cloud]
01
阴沉下来, 变得忧郁
(of a person's facial expression or mood) to suddenly become unhappy, worried, or troubled
例子
The joyous atmosphere at the party quickly changed as his expression clouded over with concern.
派对上的欢乐气氛随着他的表情因担忧而阴沉下来迅速改变了。
02
阴云密布, 变阴
(of the sky or a particular area) to become covered or obscured by clouds, resulting in a decrease in visibility
例子
We had planned a picnic, but unfortunately, the weather quickly changed, and the sky clouded over.
我们计划了一次野餐，但不幸的是，天气迅速变化，天空阴云密布。
