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他举手回答问题。（实际的“提高”。）
He raised his arm to answer the question.
youdao
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在课堂上，你想回答问题时，请举手。
When you want to answer a question in class, please raise hand.
youdao
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回答问题请举手。
Raise your hand to ask a question.
youdao
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回答问题请举手。
Raise your hand to ask a question.
youdao