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单词 rille
释义
rille also rill (ril)
n.
1. A long, narrow, roughly straight channel or groove on the surface of a solar system body like a planet or moon.
2. Variant ofrill.

[GermanRille; see rei- in the Appendix of Indo-European roots, fromLow Germanrille; see rei- in the Appendix of Indo-European roots.]
rille
Ariadaeus, a lunar rille, photographed in 1969 by the crew of Apollo 10
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