Mammogenesis
乳腺發育
??? 情景例句
Come in, come in. Please, come in.
請進， 請進。請進來。
I'm leaving tomorrow,but I haven't packed my suitcases yet.
我明天將離開，但是我還沒收拾好行李。
What would you prefer to do?
你喜歡看點什么？