Document the prerequisites and main sequence for running scripts.
记录运行脚本的先决条件和主要步骤。
The sun is thought to be about 5 billion years old and halfway through its lifetime as a "main sequence" star.
太阳现在的寿命大约是50亿年，作为一颗“主序”恒星，也只是过了生命的一半。
The star used to be like the sun, a "main sequence" star that burns hydrogen by nuclear fusion, producing helium.
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。
By plotting packages along this line and measuring their distance from the main sequence, you can infer a package's balance.
通过沿着这条直线绘制包并测量它们到主序列的距离，可以推断包的平衡。
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。
In comparison to their size on the main sequence, the stars now become giants.
同它在主星序上的大小相比，恒星现在就成了巨星。
A heavy star at the upper end of the main sequence has a rather different later history.
在主序上端的大恒星具有很不相同的晚年史。
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％。
It is really possible that the Sun possesses a relic magnetic field of the pre-main sequence epoch in its radiative core.
太阳剩余磁场是指形成于太阳主序星阶段之前，深藏在太阳辐射核内部的原始磁场。
The process flows and technical regimes of main sequence of barrel nickel plating for steel battery shell were introduced.
介绍了一种电池钢壳滚镀镍的工艺流程和各主要工序的工艺规范。
When a massive proto-star approaches the main sequence, its surface temperature is low and it can not ionize the ambient gas.
当一个大质量原星接近主星序时，它的表面温度是低的，因而不能电离周围的气体。
As these luminous and massive stars exhaust their hydrogen fuel, they begin to depart from the upper end of the main sequence.
当这些亮而且质量大的恒星耗尽了氢燃料时，它们就开始从主星序上端脱离。
When they leave the main sequence, they become a bright red supergiant, and eventually become hot enough to fuse carbon into heavier elements.
当它们离开主序时，它们会成为鲜红色的超红巨星，最终变得足够热，以至于能够将碳聚变为更重的元素。
Both Delta Sco and Gamma cas are rapidly rotating stars that are evolving off the main sequence and occasionally flinging mass from their equators.
天蝎座delta和仙后座gamma都是正在远离主星序的快速自转的恒星，并且它们不时地从其赤道区域抛出物质。
In the first introductory part it is pointed out that the main difference among current theories of stellar evolution is in the evolutionary stage after stars move onto the main sequence.
在第一部分引言中，说明现代恒星演化学说的分歧主要是在恒星形成主序星以后的演化。
After deriving their effective temperatures and luminosities from their (B-V), (U-B) colors and parallaxes we find their positions in the HR diagram to be mostly confined to the main sequence.
在从样本星的色指数（B -V） ，（U -B）和视差得到它们的有效温度和光度之后，我们发现在赫罗图上它们大多数是位于主序带内的。
Nuclear fusion is what powers all Main Sequence stars in the universe, and efforts to exploit this energy have been ongoing for decades.
核聚变是宇宙中所有主序星的动力，并且几十年来开发利用这种能源的努力一直在进行中。
They calculated that they could be almost twice as common as "main-sequence stars" - such as our own Sun - which are still burning through their hydrogen fuel stock.
他们计算出这种星体的数量是我们“主星序星体”的两倍。我们的太阳就属于“主星序星体”，现在仍然通过燃烧氢燃料发光。
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。
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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