大多数身材发育迟缓者都会赶上他们的朋友。Most late developers will catch up with their friends.通常女孩性发育成熟要比男孩早两年。Girls generally reach sexual maturity two years earlier than boys.细胞不断地分裂更新，这是人体发育过程的一部分。Cells divide and renew as part of the hu...
Autotrophic mutants were prepared from six different stocks of the homoictic group.自养突变体是从同株同核融合类群的6个不同的原种菌系制备的.The cell lost its autotrophic character and became dependent on added chemical energy sources.细胞丧失了自养的特性,变成依...
我们张贴了一份房屋生活守则。We post up a set of rules for the house.衣着不要太特别,这是一条守则.The rule is to avoid extreme clothes.工作组织人生, 它给与生命结构和守则.Work organizes life. It gives structure and discipline to life....