When the Sun first became a main sequence star, it radiated only 70% of the current luminosity.

当太阳首次成为主序星，它的辐射只有当前光度的70％。

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A star during most of its life is a main-sequence star, which consists of a core, radiative and convective zones, a photosphere, a chromosphere and a corona.

一颗恒星其生命的绝大部分处于主序星阶段，在这一阶段它包含一个核心、辐射区和对流区、光球层、色球层和日冕。

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The greater the mass of such a star, the more quickly it will use its hydrogen fuel and the shorter it stays on the main sequence.

恒星的质量越大，它消耗氢燃料的速度也就越快，它在主序中停留的时间也就越短。

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" "He's one of the hardest-working star players in the league on every possession, on every sequence, certainly every day of practice and in the weight room.

WSJ: Will Parise Cross the River?