If you select a group that includes a 3-D object, only the 3-D object is rotated. You cannot skew a 3-D object, instead, you can rotate it about the x- and y-axes by dragging the centre handles.
如果选择了一个组，并且这个组中含有三维对象，则只会旋转该三维对象。无法倾斜三维对象，但是可以通过拖动中心控点，使其绕 X 轴和 Y 轴旋转。