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。
Most mammals reach sexual maturity when their growth rates are in recession, while humans experience a growth spurt during adolescence.
当男性成熟的时候，他们的声音会变得低沉，有时候也会粗糙。
As men mature, their voices deepen and sometimes become more rough as well.
青少年患者应骨性成熟的旧记录生长板关闭的例如，15年。
Adolescent patients should be skeletally mature with documented closure of growth plates (eg, 15 years or older).
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