变截面系数factor: n. 1.〔英国〕经销人;(代客买卖收取佣金的)经纪人; ...variable: adj. 1.易变的,变化无常的,无定的 (opp. c ...cross section: (有代表性的)横截面,剖面;抽样,样品;【原子能】有效截 ...bar of variable cross section: 变截面棒bar of variable cross-section: 变截面杆下载手机词典可随时随地查词查翻译