n.两栖动物
amphibian的复数形式.
The skin of amphibians is permeable to water. 两栖动物的皮肤是透水的。
In reptiles, birds, amphibians and insects the term egg refers to a fertilized ovum with protective and nutritive tissues. 而在爬虫类，鸟，两栖动物与昆虫，卵是指受精之后的合子。
