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- A hotbed of newly born stars is swaddled in colorful blankets of glowing gas and cradledin an enormous, cold, dark, hydrogen cloud. 巨大的寒冷而黑暗的氢云构成了新恒星诞生的温床。
- SHOTS IN THE DARK: Hawaii's Gemini Observatory caught this remarkable detail of supersonic" bullets" piercing through hydrogen clouds in the Orion Nebula. 射入黑暗：夏威夷的双子天文台捕捉到了这幅令人称奇的细节画面，这是在猎户座大星云中，高速“子弹”正在射入氢气的云。
- A cloud is a mass of vapor in the sky. 云是天空中的水汽团。
- SHOTS IN THE DARK: Hawaii's Gemini Observatory caught this remarkable detail of supersonic "bullets" piercing through hydrogen clouds in the Orion Nebula. 射入黑暗：夏威夷的双子天文台捕捉到了这幅令人称奇的细节画面，这是在猎户座大星云中，高速“子弹”正在射入氢气的云。
- Our best measurements of the primordial deuterium abundance come from observations of hydrogen clouds backlit by quasars, extremely distant and bright beacons thought to be powered by black holes. 类星体一向被认为是由威力强大的黑洞所驱动的遥远而明亮的光源，测量太初氘丰度的最好方法就是观测那些后方有类星体照亮的氢云。
- Water contains hydrogen and oxygen. 水含有氢和氧。
- A cloud is a condensation of water vapour. 云是由水蒸汽凝缩而成的。
- Moloch whose fate is a cloud of sexless hydrogen! 火神他的命运是一团无性的氢气！
- 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。
- Water is composed of hydrogen and oxygen. 水由氢和氧组成。
- 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。
