What is done cannot be undone.
	覆水難收 照字面的意思是: 做過的事，不能再還原。 這與另一句諺語 "Don't cry over spilt milk" 意義相似。 It is no use for you to worry about this; what is done cannot be undone. 為此苦惱沒有用；做過的事不能再還原。