semi fluid frictionsemi-fluid friction半: half液: liquid; fluid; juice动摩擦: dynamical friction; kinetic ...动摩擦: [物理学] dynamical friction; kinetic friction; running friction◇动摩擦角 dynamic friction angle; 动摩擦系数 [力学] coefficient of kinetic friction被动摩擦轮: driven pulley下载手机词典可随时随地查词查翻译