N-COUNT（可数名词） If you say that something good is a fluke, you mean that it happened accidentally rather than by being planned or arranged. 侥幸 [非正式][usu sing, also 'by' N]
The discovery was something of a fluke.
这项发现多少有点侥幸。
N（名词） a flat bladelike projection at the end of the arm of an anchor 锚爪 (Also called flue)
N（名词） any parasitic flatworm, such as the blood fluke and liver fluke, of the classes Monogenea and Digenea (formerly united in a single class Trematoda) 寄生扁形虫