norm of matrix

例句：

1. 1. The company's policy on employee training is agood example of a norm.
   该公司关于员工培训的政策是一个很好的规范例子。
2. 2. Thenew norm in the industryis to adopt more sustainable practices.
   该行业新出现的规范是采用更多可持续的做法。
3. 3. The norm for conductingbusiness meetings has changed significantly over the pastdecade.
   过去十年里，进行商务会议的常规已经发生了显著变化。