rock which is at or forms the bottom of something; (as a count noun) a rock at the bottom of something; figurative = rock-bottom, n. 2b; Geology and M…
| 单词 | θ5783 |
| 释义 | the world > the earth > structure of the earth > constituent materials > rock > [noun] > rock at low or lowest level (2) bottom rock1810 rock which is at or forms the bottom of something; (as a count noun) a rock at the bottom of something; figurative = rock-bottom, n. 2b; Geology and M… undermass1942 An older, deformed body of rock overlain by younger, undeformed strata. |
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