Girls generally reach sexualmaturity two years earlier than boys.
女孩子通常比男孩子早两年达到性成熟。
《柯林斯英汉双解大词典》
2
Most mammals reach sexualmaturity when their growth rates are in recession, while humans experience a growth spurt during adolescence.
大多数哺乳动物达到性成熟时，它们的生长率处于衰退状态，而人类则在青春期经历性成熟的激增。
3
In a latest reanalysis of Gavan's data, nevertheless, zoologist Elizabeth Watts has found that as chimpanzees reach sexualmaturity, the growth rate of their limbs accelerates.