| 释义 |
rille Astr.|rɪl|
[a. G. rille: see rill n.1]
One of the long narrow trenches or valleys observed on the surface of the moon. (Cf. rill n.1 3.)
1868Lockyer Elem. Astron. §226 The rilles, of which 425 are now known, are trenches with raised sides more or less steep. 1878― Stargazing 350 Hours may be spent in examining the craters, rilles, and valleys on the surface. 1957New Scientist 7 Nov. 16 Criss-crossing the lunar surface there are alignments of mountains, valleys and trench-like formations called rilles. 1971Daily Colonist (Victoria, B.C.) 25 July 2/3 A gorge called Hadley Rille cuts an 80-mile long 1,200-feet-deep gash across the..face of the moon. 1977A. Hallam Planet Earth 15/3 These features, known as rilles, are shallow, often sinuous, valleys that cut across the maria. |