The first principle is that uses science and not the rule of the thumb old rules.

第一个原则是，利用科学而不是旧的经验法则。

youdao

This is the best time to go out and spoil yourself as long as you are following the rule of the thumb: Don't spend what you can't afford to lose.

这种时候是出门的最好时机，宠爱一下你自己，只要在自己的能力能承受的范围之内就行。

youdao

The rule-of-thumb was that if you captured the marketplace first, or invented a new marketplace, it was almost impossible to lose your leadership position.

大拇指规则是：如果你首先获取了一个市场，或者创造了一个新的市场，那你领导位置几乎是不可能丢失的。

youdao

So really, the rule of thumb if you think back to Scratch is -- that any time you write a statement -- -- something that does something in one line of code -- you generally need the semicolon there.

实际上，根据经验，你们回忆一下在Scratch中,任何时候你们写一条语句-,处理一些操作的一行代码-,你们通常需要在那里加个分号。

哈佛公开课 - 计算机科学课程节选

We will, however, see a lessening of the rigidity of the rule of thumb that zero inventory makes the best business sense.

FORBES: Supply Chain Lessons From Japan

Perhaps the most notable aspect of the sale, from a market perspective: While the rule of thumb for jewelry at auction is that on the secondary market pieces bring only a third of their original price, this collection reaped a hefty profit for the seller.

FORBES: Barkin Bling Brings Big Bucks

It always seems like the rule of thumb is the earlier you are, the faster you get through security.

NPR: Airport Security Marked by Hassles