老师让他大声点，因为他一直在咕哝着回答问题。
The teacher asked him to speak up because he was mumbling his answers.
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mumbling英 /ˈmʌmblɪŋ/|美 /ˈmʌmblɪŋ/
解释
### 解释
mumbling 是动词 mumble 的现在分词形式。mumble 的意思是"含糊不清地说话、咕哝"，通常指说话声音太小或发音不清楚。
The teacher asked him to speak up because he was mumbling his answers.
### 解释 mumbling 是动词 mumble 的现在分词形式。mumble 的意思是"含糊不清地说话、咕哝"，通常指说话声音太小或发音不清楚。
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