Those who give you a serpent when you ask for a fish, may have nothing but serpents to give.

那些当你要一条鱼的时候却给你一条蛇的人，可能除了给蛇之外没别的可给了。

Serpents cast their skin once a year.

蛇每年蜕一次皮。

New and rare Oriental serpents.

新的和罕见的东方蛇。

Six sick sea-serpents swam the seven seas.

六个生病的海蛇游过七大洋。

I have faced the great serpents of the north.

我曾直面过北方的巨蛇。