目的了解中国北方健康女性青少年青春期性发育过程。
Objective To investigate the process of puberty development of healthy adolescent girls in Northern China.
关于癌症危险性的动物实验显示，这还可能是如青春期等发育阶段额外卡路里耗费的一个标志。
It could also be a marker for extra calories consumed in growth periods like adolescence, a suggested cancer risk seen in animal research.
青春期是人生历程中一个重要的时期，人的生理发育和社会性形成都在逐渐走向成熟。
Puberty is an important period in one's life, in which one's physical growth and sociality formation are approaching maturity.
青春期是人生历程中一个重要的时期，人的生理发育和社会性形成都在逐渐走向成熟。
Puberty is an important period in one's life, in which one's physical growth and sociality formation are approaching maturity.
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