知识贝壳
知识贝壳
所属栏目：矿物学专业术语
Definition: In mathematics,a binary operation is a calculation involving two operands,inother words,an operation whose arity is two. Examples include the familiar arithmeticoperations of addition,subtraction,multiplication and division. More precisely,a b ......（本文共 651 字 ） [阅读本文] >>