The basic thumbrule 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。
2
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》
3
My TDD rule of thumb is that tests should be moist but not drenched.