名词
中文翻译：额外的
同义词：
['additional', 'extra', 'surplus']
例句：
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1.We need to buy some extra food for the party.
我们需要买一些额外的食物来参加派对。
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2.The extra effort will pay off in the long run.
额外的努力将在长期内得到回报。
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3.The extra charge was unexpected and frustrating.
额外的费用是出乎意料且令人沮丧的。