railsn.铁路名词rail的复数形式.railn.栏杆；扶手；铁轨v.抱怨；责骂；以横木围栏；铺铁轨rail drill钢轨钻孔机rail nurse沿边击球法rail crown纵梁冠rail plane轨刨,刨轨机rail scrap废钢轨rail bound有轨的rail ferry火车轮渡rail butts钢轨的切头rail motor有轨汽车rails beam轨束梁