state vt.陈述，说明
ambulance n. 救护车
car accident 汽车事故, 车祸
pileup n.连环相撞
trace v. 跟踪
hurt n. 伤害
unconscious adj.不省人事的
bleed v.流血
trapped v.被困在
rescue v.救
explode v. 爆炸
stay on the line 别挂电话
Jaws of Life 救生颚
paramedic n. 护理人员
hurry v. 赶紧;
