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- Collapsing interstellar cloud reverses its gravitational infall and expands outward into the relatively quiescent interstellar environment. 坍缩的星际云克服向内的引力而向外膨胀到较宁静的星际环境中去。
- Before the interstellar cloud contracts, it was very cold and dim. Thus, the cloud is represented by a point at the right in the H-R diagram. 在星际云收缩之前,它非常冰冷,所以在这个阶段,星际云会位于赫罗图上一个极右的位置。
- Nebulas do not necessarily involve interstellar clouds. 星云没有必要卷入星际云里。
- The paramount task here facing observational astronomy is to study real interstellar clouds. 实测天文学在这里所面临的头等任务是研究实际的星际云。
- Barnard's markings are dark nebulae, interstellar clouds of obscuring gas and dust. 巴纳德的标记黑暗星云，星际云掩盖气体和尘埃。
- The Pleiades is in the midst of what astronomers describe as a three-car cosmic pile-up as the bright stars slam into not one but two interstellar clouds of gas. 昴宿星就处于天文学家所描述的像明亮星星一样的三汽车宇宙堆积猛烈撞击成的不是一团而是两团星际气体云中间。
- A cloud is a mass of vapor in the sky. 云是天空中的水汽团。
- Lined up in Orion's belt (bottom to top) are Alnitak, Alnilam, and Mintaka all about 1,500 light-years away, born of the constellation's well studied interstellar clouds. 猎户座腰带从下往上依次是参宿一，参宿二，参宿三，全场大约1,500光年远，诞生于星座内已被仔细研究的星际尘埃云内。
- The reaction of H3+ ion and O atom provides a pathway for synthesizing H2O in interstellar clouds, thus it has attracted a great deal of experimental and theoretical studies in the past few years. H3+离子与O 原子的反应对星际云化学有着重要的意义,它为星际云中合成H2O 提供了可能的途径,为此,我们构造了激发态H3O+ (T) 的全域势能面。 第二章详细介绍了本文构建激发态H3O+ (T) 全域势能面的方法和结果。
- Asso-ciation reactions are important because of the role clustering plays in the che-mistry of the atmosphere, ionosphere and interstellar clouds as well as ingas to liquid phase transitinos. 这是因为这类缔合反应在大气、电离层、宇宙以及气液相转变化学方面很重要。
- 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 chemistry of stars and interstellar space. 天体化学关于星和星际空间的化学
- 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。
