名词
中文翻译：替身
同义词：
['stand-in', 'stand-in substitute', 'stand-in replacement']
例句：
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1. He was a stand-in for the absent president.
他代替缺席的总统。
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2. The stand-in player stepped up to take the lead in the game.
替补球员站出来接管比赛。
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3. She was the stand-in teacher when the main one was ill.
当主要老师生病时，她是代课老师。