The formula is jealously guarded.

对该配方戒备森严。

《柯林斯英汉双解大词典》

There's a good explanation for the phenomenon in the book The Formula: The Universal Law of Success by Albert Laszlo Barabasi.

阿尔伯特·拉兹洛·巴拉巴斯（Albert Laszlo Barabasi）所著的《公式：成功的普遍法则》（the Formula: the Universal Law of Success）一书对这一现象作出了很好的解释。

youdao

CO is the formula for carbon monoxide.

CO是一氧化碳的分子式。

《牛津词典》

The race car meets all of the Formula Three racing requirements except for its biodiesel engine.

VOA: special.2009.11.03

And we can calculate that with the formula that we used, which was just n minus l minus 1 equals the number of nodes.

这个我们可以用我们以前用过的那个公式来计算，也就是节点数等于ｎ减去ｌ减去１

麻省理工公开课 - 化学原理课程节选

The formula tells us or absorbed based on the energy difference between the two levels that we're going between, that the electron is transitioning between.

这些公式告诉我们,或发出的光的，频率大小,是基于，电子转移的，两个能级，之间的能量差。

麻省理工公开课 - 化学原理课程节选

Lord Barnett said it was not a tribute to the formula that it has lasted so long.

BBC: Lord Barnett demands end to Scotland funding formula

For those New Yorkers, the formula seemed to provide faster and more reliable awards.

WSJ: New York Divorce Law Moves Closer To Overhaul

Our new racing bike, the Venge, was codesigned with McLaren, the Formula One team.

FORBES: Hippie Capitalist: Specialized Bicycle's Mike Sinyard