英:[ru:l ɔv θri:]
美:[rul ʌv θri]
英:[ru:l ɔv θri:]
美:[rul ʌv θri]
比例法;
a rule in mathematics: the product of the means in a proportion equals the product of the extremes—used for finding the fourth term of a proportion where three are given
1 I did the calculation by the rule of three.
我是根据比例运算法则计算出来的。
2 Let us start with an immediate consequence of the algorithm.
我们先提出该运算法则的一个直接推论。