It's gone down a path towards maturation that's very difficult to go back up.

它在分化成熟的道路上越走越远,覆水难收了

耶鲁公开课 - 生物医学工程探索课程节选

You all know the expression, ? "Don't cry over spilt milk." Right?

你们都知道有句话叫做，“覆水难收“，对吗？

耶鲁公开课 - 死亡课程节选