测试的基本语法格式是使用一种由圆括号和方括号组成的格式帮助指定所用的语法。
The test base grammar format uses a format of parentheses and brackets to help specify the grammar to use.
但它不使用方括号和圆括号，而是使用尖括号。
But instead of brackets or parentheses, you use curly braces.
W3Eval的表达式可以包含三种括号：标准圆括号、方括号和花括号。
Expressions in W3Eval can contain three kind of parentheses: standard parentheses, square brackets, and curly braces.
括号匹配：%可以让光标从它当前所在的括号跳转到与它相匹配的括号上去，对花括号和圆括号，方括号都有效，常用于手工检查括号是否匹对。
Parenthesis Matching: % Takes you to the matching parenthesis, curly brace, or bracket, depending on what you are on. This always comes in handy as a quick double-check.
括号匹配：%可以让光标从它当前所在的括号跳转到与它相匹配的括号上去，对花括号和圆括号，方括号都有效，常用于手工检查括号是否匹对。
Parenthesis Matching: % Takes you to the matching parenthesis, curly brace, or bracket, depending on what you are on. This always comes in handy as a quick double-check.
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