因为它常在水里游泳，所以它脚上有蹼。

Because it often swims in water so it has webs on its feet.

在2007年有过记录的一种全身翠绿、足部红色的树蛙被称为“飞蛙”，因为它长长的蹼脚可以使它在下落时滑翔。

A bright green, red-footed tree frog was described in 2007, and called a "flying frog" because its long, webbed feet allow it to glide when falling.

葡萄牙水犬的历史可以追溯到公元前，还曾在15世纪跟随葡萄牙的探险家们周游世界，它们双脚带蹼，常在船只间游来游去。

With a history going back to pre-Christian times, the Portuguese Water Dog travelled with world with 15th century Portuguese explorers, swimming between ships with its webbed feet.

A sudden blow: the great wings beating still Above the staggering girl, her thighs caressed By the dark webs, her nape caught in his bill, He holds her helpless breast upon his breast.

猝然突袭，硕大的翅膀拍击,那摇摇晃晃的姑娘，黑蹼爱抚,她的大腿，他的嘴咬住她的脖子，他把她无力的胸脯紧贴他的胸脯。