The formation of lunar rilles remains a mystery.
月球山谷的形成仍是一个谜。
Rilles look like river channels on the lunar surface.
月球表面的山谷看上去像是河道。
No convincing hypothesis of the origin of rilles exist as yet, but some Suggestions have been advanced.
至今没有一种假说可以有力地说明月隙的起源，但有些见解是新颖的。
But there are so many special rilles about real estate that it makes sense to treat this as a separate field of law.
但是关于不动产却有很多专门的法规，所以完全可以把它看作一个单独的法律领域。
But there are so many special rilles about real estate that it makes sense to treat this as a separate field of law.
但是关于不动产却有很多专门的法规，所以完全可以把它看作一个单独的法律领域。
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