吃透英语课本，提升在校竞争力
n. 鳍状肢；鳍
复数：flippers
原型：flip
Not only that, but when a wave threatened to return the seal to danger, the humpback used its massive flipper to nudge it back on.
不仅如此，当一个浪头即将把海豹扫回险境之时，座头鲸还利用它的巨大的鳍状肢（五米长，动物王国中最长的）把它轻轻地推了回来。
The dolphin's flipper is injured.
海豚的鳍受伤了。
The dolphin uses its flipper gracefully.
海豚灵巧地使用它的鳍。
adj.无礼的
rude
impolite
n.[脊椎]鳍状肢；鳍；烤饼；胖听罐头
fin
fim
