名词
中文翻译：Unknown
同义词：
['额外保险', '附加险', '超额险']
例句：
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1. This policy provides coverage for accidents and injuries that occur during the trip.
这份保单为旅行中的意外和伤害提供保障。
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2. Premiums are calculated based on the amount of coverage purchased.
保费根据所购买的保险覆盖范围来计算。
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3. The premiums for this type of insurance can vary greatly depending on the level of coverage and the location.
这种保险的保费会根据覆盖范围和地点的不同而有很大差异。