A system of bodies designed to convert motion of and force on, one or several bodies into constrained motion of and forces on, other bodies.

• 机构是人为设计而成的系统,用来将一个或几个物体的运动转变为另外一些物体的约束运动,或将作用在一个或几个物体上的力转变为作用在另外一些物体上的力。