prolong[prə'lɔŋ; 'lɔ:ŋ]vt.1.■延长;拉长;拖长;延长时间;使持久:They prolonged their visit by two days.他们延长访问二天。2.■拖长(音节等的)发音:to prolong the “i”of bit把bit 一词中的 “i” 拖长发音3.■[废语]推迟 [亦作prolonggate]近义词extend
prolongprolong[prəˈlɔŋ]vt.1.■拉长; 延长; 引伸2.■拖延, 延期prolong one's life延长寿命prolong the runway of an airfield加长机场跑道