小心那条毒蛇。

Be cautious around that ___poisonous snake.

一些动物，比如毒蛇，需要特殊的笼子。

Some animals, like ___poisonous snakes, need special cages.

有毒生物可以通过注射毒素来自卫。

A ___poisonous creature can defend itself by injecting toxins.