A quirk is something unusual or interesting that happens by chance.
例句
By a tantalising quirk of fate, the pair have been drawn to meet in the first round of the championship...仿佛是命运的捉弄，这对选手在锦标赛第一轮比赛中就狭路相逢。The spate of storms and hurricanes in recent years could be a statistical quirk.从统计数字上看，近些年来暴风雨和飓风的频发非同寻常。
N-COUNT
怪癖;古怪的性格
A quirk is a habit or aspect of a person's character which is odd or unusual.
例句
Brown was fascinated by people's quirks and foibles.布朗对人们的种种怪癖十分着迷。