https://lsferreira.net/posts/zet-1-classes-betterc-d/by Luís Ferreira
[I have translated it into Chinese](https://fqbqrr.blog.csdn.net/article/details/121441466).
https://lsferreira.net/posts/zet-1-classes-betterc-d/by Luís Ferreira
[I have translated it into Chinese](https://fqbqrr.blog.csdn.net/article/details/121441466).