On occasion, we have, instead of including all of Chapter 9, taught Chapters 7 and 8 on dynamical processes and hydrodynamics, followed by parts of Chapter 10 on domain walls, kinks and solitons.

• 偶尔，我们不教授第9章，而是讲授第7、8章中的动力学过程和流体力学以及第10章中的磁畴壁、缺陷和孤立子。