n.线索；提示
We have no clue as to where she went after she left home. 我们对她离家後去往何处毫无线索。
They are now trying to chase down all possible clues. 他们现在正在设法寻找一切可能的线索。
I gave him another clue, but he still didn't twig (the answer). 我又提示他一次，他还是不理解(那答案).
