| 单词 | rock froth |
| 释义 | > as lemmasrock froth rock froth n. molten or solidified lava that has expanded or that is low in density due to the presence of internal bubbles of steam or gas. ΚΠ 1878 J. Le Conte Elements Geol. iii. 84 The whole liquid mass may swell into a rock-froth, which rises to the lip of the crater. 1919 Amer. Highway Engineers' Handbk. iii. 93 These are called pumice when the bubbles are very small, forming a light rock-froth. 2005 Sci. Weekly (Nexis) 11 Apr. c1 Rock froth is shattered and hurled high into the air as volcanic cinders ash and dust. < as lemmas |
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