water flea
柯林斯词典
1. N any of numerous minute freshwater branchiopod crustaceans of the order Cladocera, which swim by means of hairy branched antennae 水蚤→see also daphnia
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1. N any of numerous minute freshwater branchiopod crustaceans of the order Cladocera, which swim by means of hairy branched antennae 水蚤→see also daphnia