unwritten law

基本解釋

But is an unwritten law that even the sternest Tramp Majors do not search below the knee, and in the end only one man was caught.
好在即使是最刻薄的收容站站長也不會搜查膝蓋以下的部位，這算是一條不成文的規(guī)矩吧。
It is an unwritten law that they must never fall, says Friederike Hauffe, who teaches a course in art marketing atBerlin's Free University.
弗里德里克哈菲表示有一條不成文的規(guī)則，即經(jīng)銷商不能失敗，哈菲在柏林的一家自由大學教授藝術(shù)市場課程。
Contrary to every unwritten law of fashion, Armani's overriding aesthetic has remained consistent: minimalist sophistication and casual chic.
與時裝界所有不成文的規(guī)則背道而馳，阿瑪尼首要的審美觀點始終不變：化繁為簡，去浮存真，看似漫不經(jīng)心，其實優(yōu)雅非凡。

That was the unwritten law.
FORBES: Are Clients Becoming More Creative Than Agencies?
Rather, it is an expression of traditional law, which is usually unwritten, unpredictable and dependent on the chief's whim.
ECONOMIST: No title

the law based upon custom, usage, and judicial decisions, as distinguished from the enactments of a legislature, orders or decrees in writing, etc

習慣法
The first chapter is about the succession marriage in the unwritten law.
第一章是習慣法中的收繼婚。
不成文法律
不成文法