名词
中文翻译：额外的小手
同义词：
['extra hand', 'additional hand']
例句：
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1. She held her baby's extra hand to comfort him.
她用她的额外小手安慰他。
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2. The artist added an extra hand to the painting.
艺术家在这幅画上增加了额外的一笔。
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3. He gave me his extra hand to help me carry the heavy box.
他给了我他的额外一只手来帮我搬那个重箱子。