norm

/nɔrm/

a standard or model or pattern regarded as typical

Chinese meaning: 规范；标准；常态

In many cultures, it is the norm to greet people with a handshake.

在许多文化中，与人握手问候是常态。

Social norms can vary significantly from one country to another.

社会规范在不同国家之间可能有很大差异。