flukes

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

"她平时乒乓球打得并不好,那取胜一击抽球不过侥幸而已。"

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

涡虫雌雄同体，生殖系统适于体内受精。吸虫（殖纲）鱼外寄生虫。

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，那个长着山羊胡子家伙遛着他那只皱皮疙瘩苏格兰梗，或者那个长腿金色长发美女跟她阿富汗猎犬一慢跑时候，他们简直就一对？