N-COUNT [usually singular, oft byNOUN]侥幸;意外;偶然 If you say that something good is a fluke, you mean that it happened accidentally rather than by being planned or arranged. 侥幸;意外;偶然 [informal] [Also + of]
The discovery was something of a fluke.
这个发现多少有点机缘巧合。
By sheer fluke, one of the shipowner's employees was in the city.