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 situation poses a grave threat to world peace. 这局势对世界和平构成了严重的威胁。
- A cloud is a condensation of water vapour. 云是由水蒸汽凝缩而成的。
- The railway is under threat of closure. 那条铁路有停止运营的迹象。
- Narcotics are a major threat to health. 毒品是危害健康的大敌。
- 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。
- His presence is a threat to our success. 他的出现对我们的成功是一个威胁。
- Ice-floes are a threat to shipping in the area. 浮冰对这一带的航运是一种威胁。
- The sun disappeared behind a cloud. 太阳消失在一片云后面。
- The threat of war has depressed business activity. 战争的威胁使经济萧条。
- 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。
- Terrorism is a threat to the whole country. 恐怖主义是整个国家的祸根。
- 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。
- The situation poses a grave threat to peace. 这一局势对和平构成重大威胁。
- This constitutes a threat to national security. 这对国家安全是不祥之兆。
- 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。
