prolongvt.延长;拖延
prolong the agony拖延痛苦
prolonged driving长时间驾驶
prolonged plateau平台延长
prolonged heating长期加热
prolonged illness久治不愈的病, 持久性的病
prolonged sitting久坐
prolong bloom time延长花期
prolonged aeration延时曝气
prolongation index伸长指数
prolonged exposure迁延照射