听力 | You should raise your hand before you talk

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◎ 英文表达：You should raise your hand before you talk.

◎ 中文释义：说话前你应该先举手。

◎ 使用场景：教室内常听到的课堂用语。

◎ 重点词汇：● raise ● hand ● talk

◎ 深度解析：should情态动词，责任或义务，“应当”