短語詞組短語work of magnetic force 磁力做功work of internal force 內力的功virtual work of imposed force 虛位移the work of gravity force 重力功the work of Ampere force 安培力做功work of static friction force 靜摩擦力的功work of a spring force 彈性力的功Work of the external force 外力做的功;外力功transfer of work force 中勞動力轉移 返回 work of force