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1·Without unwritten rules civilized life would be impossible.

没有不成文的规章，就不会有文明生活。《牛津词典》

2·They obey the one unwritten rule that binds them all–no talking.

他们遵守那条约束他们所有人的不成文规定—不许说话。《柯林斯英汉双解大词典》

3·The photographs were to be included in his as yet unwritten autobiography.

这些照片准备要收入他那尚未写的自传。《牛津词典》

4·Universal has agreed to pay $5 million for Grisham's next, as yet unwritten, novel.

环球公司已同意给格里森姆的下一部还未完稿的小说支付500万美元。《柯林斯英汉双解大词典》

5·As they graduate, they can sing Today is where your book begins, the rest is still unwritten....

毕业时，他们唱道：“从今天起展开你的人生篇章，余下部分待你书写……”

6·In football, as in life, the future is unwritten.

依此类推。 在足球，就像生活中的其它事情一样，事事难料，前途未卜。

7·This bloke was breaking the unwritten rules for men.

这个家伙打破了男人们应该遵守的不成文规则。

8·In the volumes of black history, much remains unwritten.

在黑人的史册中，有很多篇章尚未书写。

9·Like most languages, Koro is unwritten and transmitted orally.

就像大部分语言一样，珂珞语没有书写文字，依靠口耳相传。

10·Luckily, I had a mentor who helped me figure out the unwritten rules.

幸运的是，我找到了一位导师，帮助我理解了那些不成文的游戏规则。

不成文

1·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。

2·Preserving that kind of social hierarchy is an unwritten assumption in deciding which solutions to the world's problems arrive on the table and which do not.

在解决世界即将面临的问题的时候，选择或者不选择哪种解决方案的不成文的前提是保持现有的这种社会等级制度。

3·It is because, given high levels of illiteracy, many Afghans and Pakistanis find it easier to understand unwritten customary law, in Pushtu called narkh.

原因在于，由于高文盲率，许多阿富汗人和巴基斯坦人发现更容易理解不成文的习惯法（customary law[font=宋体]），普什图语中称为“narkh[font=宋体]”。

4·Here's why: Valley culture has an unwritten rule that if you don't like a job, or if you think your company isn't going anywhere, you leave.

这就是为什么：硅谷文化有一个不成文的规矩，如果你不喜欢某个工作，或者你觉得公司没啥前途，你走人即可。

5·Luckily, I had a mentor who helped me figure out the unwritten rules.

幸运的是，我找到了一位导师，帮助我理解了那些不成文的游戏规则。

未成文的

1·Ben Dattner, a principal with Dattner consulting LLC, an organizational-effectiveness consulting firm, cautions that there can be lasting consequences to breaking unwritten rules.

Dattner Consulting LLC，一家组织效力咨询公司的负责人Ben Dattner，注意到违反了未成文的规矩会造成持续性的后果。

没有写的

1·What's the unwritten contract between you and the people who report to you?

什么是那没有写的你和报告你的人之间的契约？

口头的

1·C are unwritten or unavoidable but necessary (administration, travel, personal).

“C”级事项是口头的或者是不可避免的，但确是必须的(管理、旅游，私人事情)。

(1)unwritten law[律]习惯法；[律]不成文法