fluke
/flu:k; fluk/ n (usu sing 通常作单数) (infml 口) thing that is accidentally successful; lucky stroke in a game 侥幸的成功; （在比赛中）侥幸击中
Passing the exam was a real fluke he didn't work for it at all. 他考试及格实在是侥幸, 因为他根本没下过功夫.
That shot was a sheer fluke. 那完全是靠侥幸击中的.