She had only spent 20 minutes writing her essay. She won the writing contest by a fluke.
她写那篇文章才花了二十分钟，她侥幸赢了作文比赛。
Astronomers measure how much dark matter lies in galaxies by a fluke of physics called gravitational lensing.
天文学家通过一种叫做引力透镜效应的物理现象来测算星系中暗物质的质量。
She won the writing contest by a fluke. She had only spent 20 minutes writing her essay.
她侥幸赢了作文比赛，她写那篇文章才花了二十分钟。
She won the writing contest by a fluke. She had only spent 20 minutes writing her essay.
她侥幸赢了作文比赛，她写那篇文章才花了二十分钟。
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