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
Her face clouded over when she received the unexpected news of her friend's accident.
当她收到朋友意外的车祸消息时，她的脸阴沉了下来。
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
As the day progressed, the sky started to cloud over, casting a grayish hue across the landscape.
随着一天的推进，天空开始阴云密布，给风景投下了一片灰蒙蒙的色调。
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。
