Flip Face Normals

• 反转面法线

Flip Face Normals的用法和样例：

例句

1. He who despises the sick will not see light, and the day of him who turns his face from a man straitened by affliction will become darkness.
   轻视病人的人不会看见光，若人对受痛苦折磨的人转面不顾，他的白天将成为黑暗。