flukes

She is not usually good at table tennis; that winning stroke was a fluke.

"她平时乒得并不好,取胜的一击抽不过是侥幸而已。"

4 Turbellarians are monoecious with the reproductive systems adapted for internal fertilization. And the monogenetic flukes (class Monogenea) are mostly ectoparasites of fishes.

涡虫是雌雄同体的，生殖系统适于体内受精。起源的吸虫（殖纲）大多是鱼的外寄生虫。

Ever wonder if that whiskery fellow walking his jowly Scottish terrier or that leggy, long-haired blonde jogging with her Afghan hound were just flukes?

你有否觉得，着山羊胡子的家伙遛着他只皱皮疙瘩的苏格兰梗，或者腿的金色发美女跟她的阿富汗猎犬一起慢跑的时候，他们简直就是一对？