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单词 rill
释义

WordReference Random House Unabridged Dictionary of American English © 2024
rill1  (ril),USA pronunciation n. 
    1. a small rivulet or brook.
    • Dutch or Low German; compare Frisian ril
    • 1530–40

rill2  (ril),USA pronunciation n. [Astron.]
  1. Astronomyany of certain long, narrow, straight or sinuous trenches or valleys observed on the surface of the moon.
Also, rille. 
  • German Rille; see rill1
  • 1885–90

Collins Concise English Dictionary © HarperCollins Publishers::
rill /rɪl/ n
  1. a brook or stream; rivulet
  2. a small channel or gulley, such as one formed during soil erosion
  3. Also: rille one of many winding cracks on the moon
Etymology: 15th Century: from Low German rille; related to Dutch ril
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更新时间：2025/2/23 4:53:02