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1.A wide, flat limb, as of a seal, whale, or other aquatic mammal, adapted for swimming.
鳍，鳍足海豹、鲸或其它水生哺乳动物的宽而扁的适于游泳的肢收藏指正
2.The disappearance of the baiji would be the first instance of a large aquatic mammal being driven to extinction since hunting killed off the monk seal around 1952.
自1952年左右僧海豹由于人类狩猎而惨遭灭绝以来，白暨豚的消失是大型水生哺乳动物被赶尽杀绝的第一例。收藏指正
3.aquatic carnivorous mammal having a streamlined body specialized for swimming with limbs modified as flippers.
水生食肉型哺乳动物，流线型身体适于游泳，鳍状肢。收藏指正
4.large aquatic carnivorous mammal with fin-like forelimbs no hind limbs, including: whales; dolphins; porpoises; narwhals.
大型水生食肉哺乳动物，前肢象鳍、无后肢，包括：；鲸；海豚；鼠海豚；独角鲸。收藏指正
5.terrestrial or aquatic flesh-eating mammal; terrestrial carnivores have four or five clawed digits on each limb.
陆栖或水栖的食肉类哺乳动物；陆栖类的每个肢体上有四或五个带爪的趾。收藏指正
6.Also called duckbill semi aquatic egg-laying mammal native to Tasmania and southern and eastern Australia.
鸭嘴兽是半水栖卵生哺乳动物,原产于塔斯马尼亚岛和澳洲的南部及东部。收藏指正
7.These mechanisms, part of the marine mammal diving response, are adaptations to living in an aquatic environment and help during the process of sleeping.
这些机制作为部分海洋动物潜水的反应，是对在水生环境中生活的适应，并有助于睡眠。收藏指正
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