操作符的优先级 meaning in English

precedence of operators

The priority of the operators is irrelevant
操作符的优先级不相关
In postfix notation , the need for parentheses is eliminated and the priority of the operators is no longer relevant
在后缀表达式中，不需要括号，而且操作符的优先级也不再起作用了。
To convert an expression in an infix expression to its equivalent in postfix notation , we must know the precedence and associativity of operators
要把表达式从中缀表达式的形式转换成用后缀表示法表示的等价表达式，必须了解操作符的优先级和结合性。