妙龄的英文：
puberty

Margaret had reached the age of puberty.
玛格丽特已到了青春期。

a young person of either sex (between birth and puberty).
（从出生后到青春期）任一性别的青年人。

The first menstrual period, usually occurring during puberty.
月经初期第一次月经期，通常发生于青春期。

The boy's voice is beginning to crack at the age of puberty.
这男孩子的嗓音在发育期开始变得粗声粗气。

Malignant melanoma can begin in moles but almost never before puberty.
恶性黑素瘤可能发展自色素痣，但青春期前几乎不会发生。