burr2 /b3：(r); b3-/ n 1 whirring sound made by parts of machines that turn quickly. (機(jī)器各部急速運(yùn)轉(zhuǎn)所發(fā)的)轆概聲。 '~-drill 〃 one'used by den-tists. (牙醫(yī)用的)鉆孔器。 2 marked pronunciation oft'; marked (rural) accent: 顯著的 r 音; 顯著的(鄉(xiāng)村)口音： speak with a soft West-country 說話帶些輕柔的西部鄉(xiāng)村口音。