| 1. | Similar to other main sequence stars , hydrogen nuclei will be fused to helium nuclei in the core
和其他恒星一样，大质量恒星会在主序阶段把氢转化为氦。 |
| 2. | When a star is at the main sequence stage , its interior continuously fuses four hydrogen nuclei i . e . protons into one helium nucleus
在主序星阶段，恒星内部不断把四粒氢原子核即质子融合成一颗氦原子核。 |
| 3. | The suggestion was that the deuterons ? hydrogen nuclei bearing an extra neutron each ? making up the heavy water were fusing
这项宣布掀起极大的争议，因为这表示，重水中的氘核（比一般氢原子核多一个中子）发生了融合反应。 |
| 4. | Which turns four hydrogen nuclei to a helium nucleus . the star will have a convective shell and a radiative core just like our own sun see
进行，将四颗氢原子核结合为一颗氦原子核，恒星会有辐射核心和一个对流外壳就像我们的太阳。 |
| 5. | Since a carbon nucleus is six times more positively charged than a hydrogen nucleus , the cno cycle can only operate at the higher temperature and density provided by the more massive stars
但因碳原子核带的电荷是氢原子核的六倍碳氮氧循环需要只有质量大星体所能提供的较高温度和压力才能维持。 |
| 6. | To give readers an example : the electron cloud of a hydrogen atom on earth is essentially distributed spherically around the hydrogen nucleus . but interesting things occur when we place a hydrogen atom in a strong magnetic field of 8 x 10
举例说，在地球上，氢原子的电子云呈球状分布在氢的核心内但当你把一颗氢原子放在8x10 |
| 7. | Reaction , which consists of several steps . interested students should look up the textbooks for a discussion of the details of the p - p chain reaction . the net effect is that four hydrogen nuclei fuse into a helium nucleus and produce a large amount of energy carried away by the photons in the form of gamma ray and others particles
，这种机制包括一连串的核反应有兴趣的读者可参考课本较详细的讨论，但总结果是四颗氢原子熔合为一颗氦原子，过程中会以发放伽玛射线光子及其他粒子的形式释放出大量能量。 |
| 8. | Which is very dim and hence very difficult to find . if it is massive enough though model dependent , the lower mass limit is about 0 . 1 solar mass , the gas in the protostar continues to heat up until the central portion becomes hot and dense enough for , say , the hydrogen nuclei to overcome their mutual electrical repulsion . nuclear fusion will then take place and a star is finally born
如果原行星质量足够大下限约为0 . 1个太阳质量，要注意的是，不同的理论模型会给出不同的下限，原恒星会不断变热，直至核心部分足够热和高压，令氢原子核克服质子间的电排斥力，产生核聚变，成为一颗真正的恒星。 |
