提示：点击例句中的单词，就可以看到词义解释

Learn the unwritten rules of loud , lively conversations

学习大声地、有生气地谈话的不成文法则

He broke two of the unwritten rules of the pri 's authoritarian regime .

他打破了革命制度党独裁政体两个不成文的规定。

It is one of the unwritten laws of business , a matter of simple percentages .

这句话是商业经营的不成文规则，就是简单的百分比问题。

Over past years , with a few exceptions , this policy has been an unwritten norm .

过去几年，除少数特例外，该政策一向是一个不成文的准则。

It is an unwritten rule of french politics that presidents must distance themselves from the paris elite .

法国政界有个不成文的规定，那就是总统的出身必须和巴黎精英界划清界限。