单词 | cumulus |
释义 | cu·mu·lus ![]() n. pl. cu·mu·li (-lī′) 1. A dense, white, fluffy, flat-based cloud with a multiple rounded top and a well-defined outline, usually formed by the ascent of thermally unstable air masses. 2. A pile, mound, or heap. [Latin, heap; see keuə- in the Appendix of Indo-European roots.] ![]() |
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