unwritten rule

Although the focus in cheerleading is on athletics , it's an unwritten rule that appearance counts.

而最困难的事情就是要让队里所有的人一直在精神和体能上都保持良好的状态.

Meetings must not be like court rituals in which no one dares to express an opinion because of an unwritten rule that final decisions have already been made from above.

避免会议像一次法庭审讯，也要避免这种现象：没有人敢于发表意见，因为存在一个不成文的规定，上面已经做出了最后决定。

They obey the one unwritten rule that binds them all—no talking.

他们都遵守着那条约束他们所有人的默认规则——要守口如瓶。

Newcomers can ask those people to alert them when they've unknowingly an unwritten rule.

新人们可以请这些人在他们不知情地违反规矩时及时的提醒他们.

This unwritten rule resulted in the sharp increase in the trafficking of Chinese laborers during a time when slave-trafficking was also in full swing in the United States.

这规定加强了当时和美国贩卖黑奴同步增长的贩卖中国“猪崽”的活动。

A powered vessel should give way to sail-it is an unwritten rule of the sea.

机动船在遇到帆船时必须让其先行,这是一条不成文的航行规则.

It's an unwritten rule of suburbia...

毕竟小区里有着这样一条不成文的规定

A powered vessel should give way to sail — it is an unwritten rule of the sea.

机动船在遇到帆船时必须让其先行,这是一条不成文的航海规则.

I've become skeptical2 of the unwritten rule that just because a boy and girl appear in the same feature, a romance must ensue.

ON RELATIONSHIPS关于感情关系只是因为一个男孩和一个女孩出现在电影中，就必须有恋爱情节，我对这条不成文的规定感到怀疑。

They obey the one unwritten rule that binds them all — no talking.

他们都遵守着那条约束他们所有人的默认规则——要守口如瓶。

He bore the unwritten rule in mind.

他牢记那条不成文的规矩.

According to an unwritten rule in old families, grandparents were expected to pay for the grandson's wet nurse.

依照旧家庭的不成文法，孙子的乳母应当由祖父母出钱雇的。