The synthesis of estrogen is catalyzed by aromatase.The female chicken gonads can develop into male when the activity of aromatase is blocked by aromatase inhibitor(AI) before sexual differentiation. 在性分化前用芳香化酶抑制剂（AI）阻断芳香化酶的活性，以抑制雌激素的合成，雌性鸡胚的性腺则可发育成为雄性。
What is the most beneficial form of estrogen? 怎样才是雌激素治疗的最好方式?
Auditing is the primary activity of the CPA. 查帐是注册会计师的一项主要活动。
Love is the only reasonable, activity of man. 爱是人唯一有理性的行为。
Love is the only reasonable activity of man. 爱是人唯一有理性的行为。