protostellar

常见例句

The protostellar phase is an early stage in the process of star formation.
這不是核反應造成的，衹是重力能量轉換成的熱動能。
The absence of protostellar cloud material and the low velocity of the stars shows they could not have been born relatively recently or sailed in from elsewhere in the galaxy.
星系中缺少原恒星物質雲團，而且其中的恒星運轉速度低，說明恒星不可能是在最近誕生的，也不會是從星系的其他地方飄然而入。