| 单词 | water flea |
| 释义 | water flea n. 1. Any of various small chiefly freshwater branchiopod crustaceans of the order Cladocera, having a bivalve carapace and typically swimming with jerking flealike motions, and including the daphnias. Also called cladoceran. 2. Any of various other small aquatic crustaceans, such as some copepods, that swim with a similar motion. |
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