科学家只知道大脑中的下丘脑垂体性腺轴(hypothalamic pituitary - gonadal axis)被激活，青春期发身期才开始。

Scientists know that it can't start until the hypothalamic pituitary-gonadal axis is activated in the brain.

youdao

科学家只知道大脑中的下丘脑垂体性腺轴(hypothalamic pituitary - gonadal axis)被激活，青春期发身期才开始。

Scientists know that it can't start until the hypothalamic pituitary-gonadal axis is activated in the brain.

youdao