名詞 clouding:

1. the process whereby water particles become visible in the sky
   同義詞：clouding up

動詞 cloud:

1. make overcast or cloudy
   同義詞：overcast, cloud
2. make less visible or unclear
   同義詞：obscure, befog, becloud, obnubilate, haze over, fog, cloud, mist
3. billow up in the form of a cloud
   同義詞：cloud
4. make gloomy or depressed
   同義詞：cloud
5. place under suspicion or cast doubt upon
   同義詞：defile, sully, corrupt, taint, cloud
6. colour with streaks or blotches of different shades
   同義詞：mottle, dapple, cloud
7. make milky or dull
   同義詞：cloud

1. Dark clouds are a sign of rain or snow.
   烏云是雨或雪將至的預(yù)兆。
2. On the night of December1,1930, a cloud of smog moved over a valley in Belgium, which caused thousands of people to become ill.
   1930年12月1日晚上，一片煙霧飄過比利時的一個山谷，這使數(shù)千人病倒了。