您要查找的是不是：
- A cloud is a mass of vapor in the sky. 云是天空中的水汽团。
- The tail exhaust pipe of the motor vehicle emitted poisonous smoke. 机动车的尾部排气管排出有毒的浓烟。
- A cloud is a condensation of water vapour. 云是由水蒸汽凝缩而成的。
- 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。
- The wind dispersed the cloud from the sky. 风吹散了天上的云。
- He was on cloud nine after winning the competition. 他在比赛获胜後欣喜若狂。
- The banks of dark cloud promised rain. 天上片片乌云，就要下雨了。
- The sun disappeared from view behind a cloud. 太阳被云遮住看不见了。
- Thick cloud blotted out the view. 云层把风景遮住了。
- A cloud of locusts hit the farm. 大群蝗虫袭击了那个农场。
- The decision will only cloud the issue. 这一决定只能使这一问题变得复杂起来。
- A cloud of smoke was suspended in the air. 一股烟云飘悬在天空中。
- The exhaust valve on my car have burn out three times. 我车子上的排气阀已烧坏三次。
- A cloud is a mass of vapour in the sky. 云是天空中的水汽团。
- Every cloud has a silver lining. 黑暗中总有一丝光明。
- Exhaust gas has been incriminated in air pollution in cities. 废气已过视为城市空气污染的原因。
- The exhaust valve on my car has burnt out three times. 我车子上的排气阀已烧坏三次。
- Something has gone wrong with the car's exhaust system. 汽车的排气系统出了故障。
