There's an
unwritten rule that you don't talk about politics at the dinner table.
有一条不成文的规定，就是在餐桌上不要谈论政治。
The
unwritten social contract between the generations is breaking down.
代际之间不成文的社会契约正在瓦解。
She was well aware of the
unwritten code of conduct in her profession.
她很清楚自己职业中不成文的行为准则。
The company has an
unwritten policy of promoting from within.
这家公司有一项不成文的政策，即从内部提拔人才。
There are
unwritten rules about how to behave at a funeral.
在葬礼上如何表现有一些不成文的规则。
The
unwritten law of the jungle is survival of the fittest.
丛林法则这条不成文的法律就是适者生存。
He broke one of the team's
unwritten rules by speaking to the press.
他违反了团队中一条不成文的规则，向媒体透露消息。
The
unwritten agreement between us was that we would share the expenses.
我们之间有一个不成文的协议，就是共同承担费用。
It's an
unwritten tradition that the eldest son inherits the family business.
长子继承家族企业的传统是不成文的。
There's an
unwritten understanding that we won't interfere in each other's personal lives.
我们之间有一种不成文的理解，那就是不干涉彼此的私生活。
Societal norms and unwritten rules ensure that.
There is an unwritten rule in almost every business that if a company fully caters to the preferences of consumers, it will win the market.
In late April, Air China and China Eastern Airlines both won approval to launch new flights between Shanghai and London, breaking a longtime unwritten rule that only one Chinese carrier can operate a major intercontinental flight between a particular Chinese city and the United States or Europe.
This practice has been an unwritten rule since XGIMI's founding in 2013, helping propel the small tech startup to become the country's largest intelligent projector maker in 2018, according to market consultancy International Data Corp. Projectors, manufactured using different technologies for decades, have been revived by high-tech modifications, making them popular for uses including home television and gaming.
自2013年极米科技成立以来，这一做法便成为不成文的规定，助力这家初创科技公司一跃成为2018年中国最大的智能投影仪制造商，市场咨询机构国际数据公司（International Data Corp）指出。投影仪凭借数十年来采用的不同技术，经由高科技改良得以焕发生机，广泛应用于家庭电视、游戏等领域，备受青睐。
The STAR Market has removed the unwritten price-to-earnings ratio ceiling of 23 for IPOs and strengthened information disclosure to ensure investors are well-informed to price the offerings.
A-share investors are long used to a simple way to price new shares: pricing them at the unwritten regulatory ceiling of the price-to-earnings ratio of 23.
This scheme is inclined to overdo administrative interventions from the regulator, such as the unwritten price-to-earnings ratio ceiling of 23 for IPOs and IPO pauses during market downturns to mitigate downside pressure.
The submarket revokes the unwritten rule of the issue price - the upper limit of price-to-earnings ratio at 23 - which is seen on other boards of the A-share market.