Now, stars like our sun, which are relatively small, burn hydrogen into helium, but heavier stars of about eight times the mass of the sun continue this burning cycle even after they exhausted their helium in their cores.

现在， 像我们的太阳这样相对较小的恒星会将氢燃烧成氦，但质量约为太阳八倍的较重恒星即使在其核心中的氦耗尽后仍会继续这种燃烧循环。