| 1. | Stellar spectra vary considerably .
恒星的光谱有相当大差异。 |
| 2. | The radiation of the star could not be regulated .
恒星的辐射将是无法节制的。 |
| 3. | Eventually the star's contraction slows down .
最后，恒星的收缩终于慢了下来。 |
| 4. | This suggest that the nebulas are aggregates of stars .
这说明星云是恒星的聚集体。 |
| 5. | Massive stars are hottest in their central regions .
大质量恒星的中心区域温度最高。 |
| 6. | The explosion flings out perhaps half the star's mass into space .
爆炸也许把恒星的一半质量掷到空间。 |
| 7. | The diameters of stars, unlike their masses, have an enormous range .
恒星的直径不同于它们的质量，相差很大。 |
| 8. | A constellation is a pattern of stars as seen from the earth .
一个星座只是从地球上看到的某些恒星的一种样子。 |
| 9. | It is not hard to see why normal stars should be limited in mass .
要弄懂普通恒星的质量为什么要受到限制并不难。 |
| 10. | If the stellar spectrum is known, the albedo of the dust can be obtained .
如果恒星的光谱已知，就可得出尘埃的反照率。 |
