概测法的英文：
a rule of thumb

rule是什么意思：
n. 规则；惯例；统治
v. 控制，影响；规定；统治

rule of detachment
分离规则

commutation rule
交换法则

This is what ruling is!
这就是统治的意义！

A world where the rule of law supplants the rule of the jungle
这是一个用法治取代恃强凌弱规则的世界。

He who will not be ruled by the rudder must be ruled by the rock.
不受制于船橹，就受制于礁石(一味蛮干，必定失败)。

thumb是什么意思：
n. 拇指
v. 翻阅；以拇指拨弄；请求搭便车

thumb slide rules
翼形滑尺

There is a hole in the thumb of his mitten.
他的手套的姆指上有个洞。

He caught his thumb in the door.
他的拇指让门夹住了。

The Jones family is under the thumb of the mother.
琼斯一家人都得听从母亲的。

He is a rule-of-thumb photographer.
他是一个靠经验摄影的摄影家。