an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life
双语例句
用作名词 (n.)
One way is taking the cell from a fertilized ovum. 一种方法是从受精卵中取出细胞。
The fertilized eggs are taken from the cow five or six days later. 五六天以后，便可以从母牛体内取出受精卵。
