rule of thumb
Meaning: an approximation, an extremely simplified version (often wrong), arule that is often (but NOT always) correct
Example: A grown man's thumb is almost one inch wide... But that depends on
how big of a hand you are, and how thick your fingers are. Thus, measuring
things by \"rule of thumb\" is rather inaccurate.
Origin: A lot of English measurement units are based on a Monarch's
personal body measurements. Foot, inch, yard, are all based off of a body
part, and standardized later.
页:
[1]