这些操作符会被嵌套在括号中并与其他的查询语言操作符混合在一起吗？
Can these operators be nested in parenthesis and mixed with the other query language operators?
这个正则里最外层的括号匹配了嵌套结构的开头。
The outermost parentheses in this regular expression match the beginning of the nested constructs.
注意这个操作符会一直重复下去直到匹配所有的嵌套的括号。
Notice that this operator is repeated as many times as possible to match all nested parentheses.
通过减少一层嵌套的括号使代码的可读性得以改善。
Code readability is improved by removing one level of nested parentheses.
求值过程类似于手工计算：如果表达式中包含括号，先求嵌套最深的括号对中的子表达式的值。
The process of evaluation is similar to calculating by hand: while the expression contains parentheses, the subexpression inside the deepest nested pair of parentheses is evaluated.
每个嵌套的括号对，从左开始算起，每个左圆括号加一，放在下一个特殊的数字变量中。
Each nested set of parentheses, counting from the left, incrementing at each left parenthesis is placed in the next special, numerical variable. For example.
步骤1：为避免括号的处理，W3Eval确定哪个子表达式处于嵌套最深的那对括号中。
Step 1: To avoid dealing with parentheses, W3Eval determines which subexpression lies within the deepest nested pair of parentheses.
步骤2：要实现求值的单步执行，W3Eval 在嵌套最深的那对括号中找出优先级最高的操作符。
Step 2: To perform a single step of an evaluation, W3Eval finds the operator with the highest priority inside the deepest nested pair of parentheses.
步骤2：要实现求值的单步执行，W3Eval 在嵌套最深的那对括号中找出优先级最高的操作符。
Step 2: To perform a single step of an evaluation, W3Eval finds the operator with the highest priority inside the deepest nested pair of parentheses.
应用推荐