When estrogen is present it can enter cells in the vicinity and it can bind to receptors that are deep inside cells.

雌激素能够进入到邻近的细胞中,并能够与细胞内部的受体相结合

耶鲁公开课 - 生物医学工程探索课程节选

It seems to be in the vicinity of the mouth.

它好像在嘴的附近

耶鲁公开课 - 死亡课程节选