The band was jump in 'and the joint began to swing.
乐队跳了起来，他们的关节开始摇摆。
2
In this paper, the above-knee prosthesis with a pneumatic swing control knee joint has been designed with the theory of mechanisms, biomechanics and fluid mechanics.
本文应用机构学、生物力学和流体力学等方面的理论，对气压膝关节大腿假肢进行了较为系统的分析和研究。
3
Change regularity of jointswing Angle is studied when movable platform moves in space.