The discovery was something of a fluke.

这项发现多少有点侥幸。

《柯林斯英汉双解大词典》

The whale retained a tail and lacked a fluke, the major means of locomotion in modern cetaceans.

这种鲸保留了尾巴，没有现代水生鲸类动物用于行动的主要部位，尾片。

youdao

Their streamlined bodies, the absence of hind legs, and the presence of a fluke and blowhole cannot disguise their affinities with land dwelling mammals.

它们的身体呈流线型，后肢完全消失，身体上长出了尾片和喷水孔，所有这些特征都无法掩饰它们与陆生哺乳动物之间的亲缘关系。

youdao

Well, let's make sure it's not a fluke.

让我确定一下这不是偶然。

麻省理工公开课 - 计算机科学及编程导论课程节选

As recently as a year ago people wondered whether M-PESA's success was a fluke.

ECONOMIST: Telecoms

During this time, though, almost as a fluke, DeRose discovered an ability to sing.

NPR: Dena DeRose On Piano Jazz

Ireland have to prove it was a fluke - but I'm not sure if they can.

BBC: Six Nations as it happened