main sequence

turn-off point from main sequence

主序折向点

A main sequence of instructions.

指令的主序列.

A subgiant is a star between a main sequence star and a giant.

亚巨星是一颗介于主序星和巨星之间的恒星。

scientists study the initial main sequence star to learn about stellar evolution.

科学家们研究初始主序星以了解恒星的演化。

scientists study the zero-age main sequence star to understand stellar evolution.

科学家们研究零龄主序星以了解恒星的演化。

scientists study f-type main sequence stars to understand stellar evolution.

科学家研究F型主序星以了解恒星演化。

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。

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。

Since the first affirmance of an extrasolar planetary system in pulsar PSR1257+ 12, and first discovery of a planet in a main sequence star, 51 Peg, in 1995, about half hundred of extrasolar planets have been discovered.

从1992年第一个确认了脉冲星PSR1257+12的行星系统以来，1995年确认主序星51Peg有一颗行星，至2001年5月，已经发现了60个太阳系外的行星系统。

Rotation effect has the great influence on star in the former stage of main sequence and in the latter stage of Red Giant through the angular velocity and the change of rotational angular velocity; turbulent pressure in the stage of AGB star. ( 3).

自转效应通过自转角速度和自转角速度的变化对恒星在主序星前期和红巨星后期的影响较大，而湍流压在AGB星阶段的影响较大。

Having carried on evolution model calculation from the main sequence star to the thermal pulsation AGB star for a 5M(?) star, such numerical calculation result agrees with the prediction of the new criterion.

恒星进行了从主序星到热脉动AGB星的演化模型计算，结果表明新判据能很好地反映5M（？）

astronomers study the pre main sequence star in the nebula.

天文学家们研究星云中的主序前星。

During the radiation stars will develop in turn into main sequence stars, red giants, white dwarfs or neutron stars, etc.

在历经主序星、红巨星和白矮星或中子星后演化为致密星体而结束一生。

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.

Hydrogen to helium conversion provides the prime source of energy for stars on the main sequence.

由氢向氦的转变是主序星能量的主要来源.