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.
目的探讨飞行训练对飞行学员下丘脑-垂体-性腺轴功能的影响。
Objective To explore effect of flight training on the function of hypothalamus-hypophysis-gonadal axis in flight cadets.
本实验为下丘脑—垂体—性腺轴和神经—内分泌的研究提供了有力的形态学和分子水平的依据。
Those results provided morphological basis and molecular basic for the research of brain-pituitary-gonadal axis and neuroendocrine system.
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