translation.en: So when you develop a cancerous cell in your breast, aromatase converts androgens into estrogens, and that estrogen turns on or promotes the growth of that cancer so that it turns into a tumor and spreads.
translation.zh: 当你乳房里有了一个癌细胞， 芳香化酶就把雄性激素转化成雌性激素， 而那个雌性激素又启动或促进 癌症的成长， 因此它就形成肿块并扩散。