| 例句 |
The fertilized egg implants and becomes a foetus.受精卵着床后发育成胎儿。Babies are the most difficult patients to remember. They all have the same tiny, unformed features which seem to stretch and change every five minutes.婴儿是最难记住的病号。他们那小小的五官都还没有发育成形，似乎每五分钟就会长大变化。By the end of the third month of pregnancy the foetus is a miniature human being.怀孕满三个月时，胚胎已发育成小小的人形了。 |