What is the nodal plane in this case?

这种情况下的节面在哪呢？

The nodal matrix now has the convenient form.

现在结点矩阵具有下面方便的形成。

Nodal locations and rotation angles are determined by interpolation.

节点位置和旋转角度由插值确定。

But keep in mind sigma orbitals have no nodal planes along the bond axis.

但记住sigma轨道沿着，键轴方向是没有节点的。

Pi orbitals are a molecular orbital that have a nodal plane through the bond axis.

轨道是沿着键轴,有节面的分子轨道。