mutual affinity是什么意思 mutual affinity怎么读
mutual affinity的用法和样例
- Astronomers had generally assumed it must be decelerating, because galaxies attract one another gravitationally and should retard their mutual separation.
天文学家一向认为宇宙应是减速膨胀的，因为重力作用使星系相互吸引，应该会减缓它们彼此分离的速率。
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