Cry over Spilt / Spilled Milk 浪费时间做无能为力、于事无补的事情
S:We did all we could for them.
I told him I had my eye on him as a possible underbutler in a year or so.
But... no, Mr. Charlie knows best.
M:She’s sure to be let down.
S:No use crying over split milk. Besides, we have far more important matters to discuss.
Next week’s meeting. As you know...
M:Must we discuss it tonight?