God knows
informal or goodness knows or heaven knows or Lord knows 1
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used to stress that something is not known谁知道,天晓得(用于强调不知道) 2
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used to make a statement more forceful老天有眼,老天做证(用于加强语气) -
He finally got a raise. Goodness knows he deserved one. [=he certainly deserved one]他终于加薪了。老天爷都知道他确实该加薪。
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She didn't win, but Lord knows she tried.她没有赢,但老天做证她确实努力了。