云下的
A cloud is a mass of vapor in the sky. 云是天空中的水汽团。
A cloud is a condensation of water vapour. 云是由水蒸汽凝缩而成的。
I had to sub for the referee, who was sick. 裁判病了，我得代为裁判。
There are several kinds of cloud formations. 云层的构成方式有好几种。
The couple seemed to be on cloud nine. 那对夫妇看上去极其幸福。
The sun disappeared behind a cloud. 太阳消失在一片云后面。
