功败垂成

这次最终导致功败垂成

This time it ultimately led to failure on the verge of success.

绝杀时刻的失误,恐怕导致功败垂成

A mistake at the buzzer beater moment, afraid it leads to snatching defeat from the jaws of victory.

朋友和我说了恋爱已经快要进入婚姻,最后却功败垂成的事情

My friend told me about how their relationship was heading towards marriage but failed at the last hurdle.