資料來源 : pyDict

壓低聲音,靜下來,停止說話;不再過分自信;吹哨子收工

資料來源 : WordNet®

pipe down
     v : become quiet or quieter; "The audience fell silent when the
         speaker entered" [syn: {quieten}, {hush}, {quiet}, {quiesce},
          {quiet down}] [ant: {louden}]