When importing animated characters from Maya that are created using IK, you have to check the Bake IK ; simulation box in the Import Settings. Otherwise, your character will not animate correctly.
当导入的动画角色是通过Maya使用IK（反向动力学，见上一节）创建的，你必须检查导入设置中的烘焙IK与仿真箱。否则，你的角色将不能正确动作。