You must measure the length by rule and line.

你必须准确地计量长度。

《新英汉大辞典》

I never measure rice and water when I'm cooking - I just do it by rule of thumb.

我做饭时，从不量米量水，只凭经验。

youdao

When negotiating with your top, make sure he is willing and able to abide by Rule One.

与你的支配者协商时，确保他能够也愿意遵守规则一。

youdao

His Democratic Party of Japan ended more than fifty years of nearly continuous rule by the Liberal Democratic Party.

VOA: special.2009.09.05

So the body theorist can avoid the problem of fission, avoid the problem of duplication by adding the no branching rule.

肉体主义者能避开分裂问题，通过无分支原则，避免复制导致的问题。

耶鲁公开课 - 死亡课程节选

I've got two states here, three states here, two here, I need four, and if I can come up with these bonds, four, by the Hund rule I'd fill them like this.

我们已经有2个状态在这里，3个在这里，2个在这里，我需要4个，如果我能想到这些键，四个，通过洪特规则，我们就能像这样排布。

麻省理工公开课 - 固态化学导论课程节选

But by rule, the speaker of the House controls all space south of the centerpiece of the rotunda.

NPR: A Quick Trip Through the History of Capitol Hill

The touchdown, by rule, was nullified, Owens, admittedly rattled, threw an interception on the next play, and Blue Hills held on to win 16-14.

FORBES: Excessive Celebration Penalties Are a Pox on Football, No Matter What Bob Costas Says

The calls that, for Cathedral, cost it a state title, and, for Aledo, cost its star running back a touchdown record, were, by rule, correct.

FORBES: Excessive Celebration Penalties Are a Pox on Football, No Matter What Bob Costas Says