life.guard
n.(名词)An expert swimmer trained and employed to watch over other swimmers, as at a beach or swimming pool.Also called lifesaver 救生员:经过训练的游泳专家,受雇照看其他的游泳者,例如在海滩上或游泳池旁也作 lifesaverv.intr.(不及物动词)life.guard.ed,life.guard.ing,life.guards To work or serve as a lifeguard.作救生员