形容词
中文翻译：偶然的
同义词：
['accidental', 'incidental', 'inadvertent', 'incidental to']
例句：
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1. The meeting was held on a day when the weather was incidental to our plans.
会议是在我们计划之外的一天召开的。
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2. The accident was incidental to the journey.
这次事故是旅行中的意外事件。
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3.Incidental expenses are not included in the budget.
意外费用不包括在预算中。