clouds

例句：

1. 1. The sky was filled with clouds as the sun set.
   太阳落山时，天空被云朵填满。
2. 2.The clouds were so thick that they blocked out the moonlight.
   云层很厚，以至于月光都被遮住了。
3. 3.The weather forecast said there would be a storm in the clouds.
   天气预报说云层中有风暴。