| 1. | New stars continued to come into being from the gas clouds of the disk .
新的恒星继续从圆盘中的气体云中形成。 |
| 2. | The contraction of a cool interstellar gas cloud can proceed in a variety of ways .
一个冷的星际气体云的收缩，可以通过许多不同的方式来进行。 |
| 3. | A star is formed when a cloud of gas collapses from the interstellar medium toward high density .
一个气体云自星际物质中坍缩，密度达到很高时，即形成了一个恒星。 |
| 4. | All the matter of the galaxy was originally a spherical cloud of gas from which stars were condensing out .
银河系中所有的物质最初都是球状气体云，恒星正是从中凝聚而成。 |
| 5. | The great nebula is a cloud of glowing gas centered on four hot, blue stars located about 1, 500 light-years from the earth .
这个大星云是以离地球大约1500光年的四颗很热的蓝星为中心的发光气体云。 |
| 6. | Two-and three-dimensional hydrodynamic computer codes have been applied to the study of the early phases of the collapse of a gas cloud .
二维和三维流体力学计算机程序，已用于研究气体云的早期坍缩。 |
| 7. | Some of these early steps in the development of life may have taken place in interstellar gas clouds before the solar system formed .
生命发展的某些早期过程可能早在太阳系形成以前的星际气体云中就已发生。 |
| 8. | Collisions between the gas clouds may trigger a stellar baby boom
气体云之间的碰撞可能会触发产星高潮。 |
| 9. | Some consist mostly of blue stars and puffy clouds of gas , but little dust
有些主要由蓝星和蓬松的气体云组成，几乎没有尘埃。 |
| 10. | Blast gas cloud
爆炸气体云 |
