main sequence

• 主要序列,主星序

main sequence的用法和样例：

例句

1. 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。
2. 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。