单词：evolution of stars
evolution of stars的用法和样例：
例句
- An understanding of the stellar energy sources is still more vital for the problem of stellar evolution.弄清恒星的能源对恒星演化的研究是更为关键的问题。
- Third, it is important to derive from the observations irrefutable evidence that the earliest phases in the evolution of protostars do occur.第三个重要任务是要由观测得到不可辩驳的证据来证明原恒星演化中的一些最早期现象确实能发生。
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