| 例句 |
The egg and sperm fuse together as one cell.卵子和精子结合，形成一个细胞。If the egg is not fertilized, oestrogen and progesterone decrease.如果卵子未受精，则雌激素和孕酮的分泌会减少。Genes determine how we develop from the moment the sperm fuses with the egg.从精子和卵子结合的那一刻起，基因就决定了我们会如何成长。If two ova are fertilized at the same time, the mother will have twins.如果两个卵子同时受精，母亲就会生出双胞胎。Sex cells such as eggs and sperm are haploid.生殖细胞，比如精子或卵子，都是单倍体。A single sperm fertilizes an egg.一个精子能使卵子受孕。In human reproduction, one female egg is usually fertilized by one sperm.在人类生殖过程中，通常是一个精子使一个卵子受精。Only one sperm fertilizes an egg.只有一个精子使卵子受精。Many women conceive through the use of a donor egg.很多女性使用捐赠的卵子怀孕。It only takes one sperm to fertilize an egg.只需要一个精子就能让卵子受精。The sperm and egg unite to form an embryo.精子和卵子相结合形成胚胎。Once an egg is fertilized by the sperm, it becomes an embryo.卵子受精后即成胚胎。Alcohol is the enemy of healthy sperm and eggs.酒精危害精子和卵子的健康。An embryo is created through the union of sperm and egg.胚胎是由精子和卵子结合而成的。The sperm fertilizes the egg.精子使卵子受精。 |