| 1. | Evolution of stars of all masses takes place on a hydrodynamic time scale .
各种质量的恒星的演化，均以流体力学的时间尺度进行。 |
| 2. | These investigators tenaciously argued the evolution of stars downward along the sequence ought to be accompanied by a continuous and very substantial loss of mass .
这些研究者就顽固地争辩说，恒星沿主星序向下的演化，应该伴随着连续的和很显著的质量损失。 |
| 3. | Molecular outflows mark an important phase in the early evolution of star formation
分子外流标志着恒星形成早期演化的一个重要阶段。 |
| 4. | Nature of the universe - chapter eighteen after studying the evolution of stars , we discuss objects much bigger : galaxies
在讨论过恒星演化之后，我们会讨论一些更大的天体星系。 |
| 5. | What is more important , the existence of these different kinds of black holes and the respective astronomical phenomena associated with them always brings far - reaching revelation to our understanding of the evolution of stars , galaxies and at last the whole universe
更重要的是，这些不同类型的黑洞的存在和与它们相关的天文现象，往往为人类了解恒星星系以至整个宇宙的演化，带来了深远的启示。 |
