形容词
中文翻译：额外的
同义词：
['additional', 'extraordinarily']
例句：
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1. The extra effort will pay off in the end.
额外的努力最终会有所回报。
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2. Extra care should be taken when handling fragile objects.
处理易碎物品时应格外小心。
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3. Extra time was needed for the project to complete on time.
为了按时完成项目，需要额外的时间。