This figure of speech refers to a way of doing something, or a suggestion for how to do something, that does not (or cannot) achieve the desired results. They were unsuccessful: “I suggested that our business buy supplies from a different company, but my idea didn’t fly.” “Don’t try to make Dad believe that you got good marks this semester. It won’t fly.”
(事情)行不通
這句話指的是做一件事的方法或建議最後都沒有達到預期的結果。例句：「我建議我們的業務從不同公司採買用品，但我的想法沒有被採納。」「不用企圖說服爸爸你這學期拿到好成績了，行不通的。」