proto-planetary disk是什么意思 proto-planetary disk怎么读
proto-planetary disk的相关资料
proto-planetary disk的用法和样例
- These clouds, known as protoplanetary disks, are the stuff from which planets are formed, and without them no planetary system can evolve.
这些云就是原行星盘，行星诞生的材料来源，没有它们行星系统就不能演化。
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