整数或字符串等基元类.A primitive class as integer or string.但是对于这些,我们并不需要元类.But we do not need metaclasses for that.然而在这次介绍中,我们将避免元类, 由于它们弊大于利.We will avoid metaclasses in this presentation, however, since they bring more problems...

“元类”的英语可以翻译为：metaclass ...