flipper

名词 flipper:

1. a shoe for swimming; the paddle-like front is an aid in swimming (especially underwater)
   同义词：fin
2. the flat broad limb of aquatic animals specialized for swimming

1. Seals, turtles and penguins have flippers.
   海豹、 海龟、 企鹅均有鳍状肢。

flip.per

n.（名词）
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
A rubber covering for the foot having a flat, flexible portion that widens as it extends forward from the toes, used in swimming and diving.Also called In this sense, also called fin
脚蹼；橡皮脚掌：一种戴在脚上用于游泳或潜水的橡皮覆盖物，其扁平、柔韧的部分从脚趾处向前伸展变宽也作 在此意义上也可称作 fin