副词
中文翻译：偶然地
同义词：
['unintentionally', 'accidentally']
例句：
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1.He accidentally knocked over the cup when he was rushing to catch the bus.
他匆忙去赶公交车时不小心把杯子打翻了。
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2.She accidentally spilled her coffee on her new dress.
她不小心把她的新裙子弄脏了。
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3. The accident happened by chance.
这起事故纯属偶然。