这个就是天文中非常常见的潮汐锁定(tidal locking),因为地球的质量比月球大很多,所以月球早已经被地球潮汐锁定,这也是为什么我们在地球上看月亮永远只能看到同一面的原因。
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以上来源于: WordNet
而这则是由潮汐造成。
Since the Moon always presents the same face to Earth as the result of "tidal locking", direct communication links with devices on the lunar surface can be maintained continuously.
由于“潮汐锁定”的作用,月球总是以同一个侧面对着地球,这样,设立在月球表面的通信设施就可以与地球保持不间断的直接联系。
The tidal locking situation for asteroid moons is largely unknown , but closely - orbiting binaries are expected to be tidally locked , as well as , obviously , contact binaries.
给星状的卫星潮汐的锁定情形相当未知,但是接近地-绕轨道而行二进被期望潮汐地被锁,连同,显然地,连络二进。
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