| 单词 | rib cloud |
| 释义 | > as lemmasrib cloud rib cloud n. rare a cloud formation resembling ribs. ΚΠ 1868 G. M. Hopkins Jrnls. & Papers (1959) 170 At sunset featherbed sky with a fluffy and jointed rib-cloud. 2009 docweather.com 16 Feb. (O.E.D. Archive) When it gets to a cooler area the moisture in the rising current precipitates out as ice crystals. This forms the rib cloud form. < as lemmas |
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