名詞 flipper:

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

1. Seals, turtles and penguins have flippers.
   海豹、 海龜、 企鵝均有鰭狀肢。

flip.per

n.（名詞）
A wide, flat limb, as of a seal, whale, or other aquatic mammal, adapted for swimming.
鰭，鰭足：海豹、鯨或其它水生哺乳動(dòng)物的寬而扁的適于游泳的肢
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
腳蹼；橡皮腳掌：一種戴在腳上用于游泳或潛水的橡皮覆蓋物，其扁平、柔韌的部分從腳趾處向前伸展變寬也作 在此意義上也可稱作 fin