contraet契约化contraprep.与……相反adv.正相反n.相反事物；反对意见；【会计】对方账户，抵销账户pref.表示“相反”，“反对”；【音】表示“低”、“下”contral refrigeration plant[化] 中央制冷装置contra-rotating propeller对转桨contra-cyclical movements反周期运动contra-wound helix coupler反螺旋线耦合器contravariant tensor algebra反变张量代数contra-rotating propulsion对旋推进contra-wound helix circuit对绕螺线contra-angle portepolisher反角握柄磨光器contracurrent optical system非并行光系统contraindication in pregnancy孕妇忌用