这颗恒星曾和太阳一样，是颗“主序星”(“main sequence”)。它通过核聚变燃烧氢，从而产生氦。
The star used to be like the sun, a "main sequence" star that burns hydrogen by nuclear fusion, producing helium.
如图所示，我们太阳系中的气态巨行星——木星、土星、天王星、海王星——大部分是由氢构成的。图片来自。
As indicated in the graphic, the gas giant planets of our solar system - Jupiter, Saturn, Uranus and Neptune - are mostly composed of hydrogen. Image courtesy of NASA.
天王星大气的组成，是83%的氢，15%的氦和2%的甲烷等碳氢化合物虽然已发现的痕迹。
Uranian atmosphere, by composition, is 83% hydrogen, 15% helium and 2% methane although traces of other hydrocarbons have been found.
结论云南白药乙醇对多柔比星血管外渗具有良好防护作用，碳酸氢钠次之，硫酸镁效果较差。
Conclusion Yunnan Baiyao ethanol cream has excellent protection against doxorubicin vascular leakage. Sodium bicarbonate is not as good as Yunnan Baiyao but better than magnesium sulfate.
这煽起氢燃料及原因进行不断增长的星核融合的速度在加快。
This stirs up hydrogen fuel and causes the growing star to undergo nuclear fusion at a faster rate.
某个小组对绘制宇宙中氢的分布图感兴趣，另一个则对定位脉冲星感兴趣，还有的在研究银河系的结构。
One group is interested in mapping the distribution of hydrogen in the universe, another in the location of pulsars, and yet another is studying the structure of our galaxy, the Milky Way.
某个小组对绘制宇宙中氢的分布图感兴趣，另一个则对定位脉冲星感兴趣，还有的在研究银河系的结构。
One group is interested in mapping the distribution of hydrogen in the universe, another in the location of pulsars, and yet another is studying the structure of our galaxy, the Milky Way.
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