| 单词 | dirt-line |
| 释义 | > as lemmasdirt-line dirt-line n. a layer of dirt and debris accumulated on the surface of a glacier and imprisoned by the seasonal layer of snow. ΚΠ 1894 J. Geikie Great Ice Age (ed. 3) 30 The beds of snow..being usually marked off by a ‘dirt-line’ or crust formed of a mixture of dust, small grit, and occasional remains of insects. < as lemmas |
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