If you have any problems with or suggestions about the complementary classes as mentioned above, please let your SA know and further adjustments will be considered.
当然，如果大家有任何关于补充课的意见和建议，都可以向上课老师反馈，我们会集中考虑并且做进一步调整。
Beyond those examples we've seen so far, expando meta-classes also provide some complementary hooks. Four other kind of methods can be added to an expando meta-class.
除了我们已经看到的例子，expando元类也提供了一些补充的功能。
应用推荐