变阴，云层密布

cloud over───变阴，云层密布

clouds over───变阴，云层密布

clouded tiger───云虎

clouding over───变阴，云层密布

cloud cover───[气象]云量

glossed over───v.掩盖，掩饰；给以光滑的表面

looked over───检查，察看；从…上面看；原谅

But night has clouded over.───但乌云布满了夜空。

Her face clouded over with anger.───她满面怒容。

His face suddenly clouded over.───他的脸上突然间阴云密布。

The moon was clouded over, and the wind roared in the avenue. A spark sprang out of the sky, and there was a crack, a crash.───云层遮蔽了月亮，缝在林荫路上呼啸。一道闪光划过长空，一声霹雳，接着哗啦一声响。

all that day the dogs were kept at home . it was keen and frosty weather , but towards evening the sky clouded over and it began to thaw.───猎犬整天呆在家中，天气很冷，寒风刺骨，但从傍晚起天空布满乌云，暖和起来了。

It was sunny and then all of a sudden, it clouded over and began to rain.───本来是晴天，但突然之间乌云密布并开始下雨。

They had planned to go swimming this afternoon, but as they were leaving the house the sky clouded over.───今天下午他们计划好去游泳，但当他们出门时，天空却乌云密布。

But the sun had no sooner started to shine than it was clouded over a gain.───但太阳刚有点光芒就给乌云挡住了。

The sun had no sooner started to shine than it was clouded over again.───太阳还没有开始出来就被云遮上了。

Her face clouded over with anger.

His face clouded over in disappointment.

After a fine day, the sky had clouded over and suddenly rain lashed against the windows.

His face suddenly clouded over.

The sky clouded over before the storm.

The sky clouded over; we could see there was going to be rainstorm.

His face clouded over when she walked into the room.

The sky clouded over and it started to rain.

The morning was quite bright, but it clouded over in the afternoon.