形容词
中文翻译：偶然的
同义词：
['accidental', 'incidental', 'insignificant', 'superficial']
例句：
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1. The accident was adventitious and not the fault of the driver.
这次事故是偶然发生的，与司机无关。
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2.The research was incidental to the main topic.
这项研究是次要的，与主要话题有关。
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3. The decision was made in a moment of indecision, which was adventitious.
这个决定是在一时冲动下做出的，并非有意为之。