The basic thumb rule toidentify a cross-cutting concern is: If a concern is repeated across classesspread over layers / tiers, then it is a cross-cutting concern.

识别一个横切关注点的经验法则是：如果一个关注点反复出现在不同类及层次中，那它是一个横切关注点。

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A good rule of thumb is that a broker must generate sales of ten times his salary if his employer is to make a profit.

一个很好的经验法则是，雇主要获取利润的话，其中间人必须创造10倍于自己薪水的销售额。

《柯林斯英汉双解大词典》

My TDD rule of thumb is that tests should be moist but not drenched.

我的 TDD 经验法则是，测试应该是湿润的，但是不要湿透。

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Light travels basically a foot in a nanosecond. Simple rule of thumb.

光行进的速度是每纳秒一英尺,很简单的经验法则了。

麻省理工公开课 - 计算机科学及编程导论课程节选

That's actually a really good rule of thumb.

那实际上是一个好的经验法则。

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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

For tax-conscious investors, it's a good rule of thumb to sell losers while holding onto winners.

FORBES: Magazine Article

As a general rule of thumb for TV appearances, I suggest following what the masters do.

FORBES: To Button Or Not To Button, That Is The Question -Media Training

The prevailing rule of thumb is that deflation, not inflation, is the dreaded external reality.

FORBES: Magazine Article