Retroplasia
[醫] 退行性化生
??? 情景例句
Not at all. Check it, please.
好的，請檢查。
You have to be there half an hour before departure time.
你要在起飛前半小時到那里。
will finally become so steep that we can live no longer,
但最終會急轉直下，我們也無法再活下去了。