rule of thumb片語

經驗法則、大致準則

A good rule of thumb is to drink water before every meal.

一個實用的經驗法則是每餐前先喝水。

粗略估算、約略的算法

As a rule of thumb, allow two hours for the drive.

粗略估算，開車要預留兩小時。

粗略的、憑經驗的

Her rule-of-thumb estimate turned out to be surprisingly accurate.

她那個粗略的估算結果竟然相當準確。