形容词
中文翻译：额外的
同义词：
['additional', 'augmented', 'supplementary']
例句：
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1. The extra workload has caused some employees to feel overwhelmed.
额外的工作量让一些员工感到压力过大。
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2. The extra charge for the upgraded service is $50.
升级服务的费用是50美元。
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3. Extra care should be taken when preparing the food for a special occasion.
为特殊场合准备食物时应该多加注意。