freely movable joint

例句：

1. 1. The robot's joints aredesigned to be easily replaced without affecting itsfunctionality.
   机器人的关节设计成易于更换，不影响其功能。
2. 2. The new design of thecar's suspension system has made itmore freely movable.
   汽车悬挂系统的新设计使得它更加容易移动。
3. 3. The scientistused a freely movable joint totest the strength of the material.
   科学家使用一个自由可动关节来测试材料的强度。