It is a rule of the sea to help another boat in distress.

救助别的遇难船是海上的规则。

《牛津词典》

My school has a rule called the Honor Code.

我的学校有一条规则叫做荣誉守则。

youdao

I go to bed early as a rule.

我一贯睡得早。

《牛津词典》

Experts say a good rule to remember is not to post anything you would not want your mother to see.

VOA: special.2009.09.14

There's no language in the world that has a rule that says the fifth word has to be a verb.

世界上并没有语言规定,说第五个词必须是动词

耶鲁公开课 - 心理学导论课程节选

Then they implemented a rule that the guinea is worth twenty-one shillings.

于是政府就执行了一个新令,规定一个几尼值二十一个先令的价值。

耶鲁公开课 - 金融市场课程节选

Such a rule is not likely to improve private investment decision-making or promote more efficient markets.

FORBES: It's Time To Legalize Insider Trading

"This has been a rule in the United States Senate since 1884, " Durbin said.

CNN: Democrat: Blagojevich 'called our bluff' on Senate pick

As a rule, he writes about completely ordinary people, middle- and working-class, from drab places.

NEWYORKER: Blue Period