| 单词 | active layer |
| 释义 | active layernoun(in arctic or subarctic regions) the layer of soil, above the permafrost, that thaws during the summer. Words nearby active layeractive duty, active galactic nucleus, active galaxy, active hyperemia, active immunity, active layer, active list, active margin, active mass, active-matrix, active methyl Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 |
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