1. 扭转
    Torsion is a twisting effect on something such as a piece of metal or an organ of the body.

1. a twisting force

    Synonym: torque

2. a tortuous and twisted shape or position

    e.g. they built a tree house in the tortuosities of its boughs
           the acrobat performed incredible contortions

    Synonym: tortuositytortuousnesscontortioncrookedness