为什么所有的师范大学都翻译成nomal university normal 在这里怎么解释?

normal university 好像不是咱们说的师范大学，电视里记得演过。但具体怎么说，理由怎样我忘了。。。

A normal school was a school created to train high school graduates to be teachers.Its purpose was to establish teaching standards or norms,hence its name.Most such schools are now called teachers' co...