| 词汇 | pipe up | 
| 释义 | pipe up  phrasal verb with pipe verb uk/paɪp/ us/paɪp/   informal   突然开始说话(或发出噪声) to suddenly start to speak or make a noise  In the silence that followed, a lone voice piped up from the back of the room. 在随后的沉默中,从房间后面突然传来一个人的声音。  | 
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