我们可以开始写复杂点的表达式了，你可以想象，我们有一个很多括号的表达式，里面有各种各样的东西，什么问题。
We can start having complex expressions, you can imagine we can have things are lots of parens, and all sorts of things in it. Yes, question.
最后，我们看到第二个子表达式，它除了有由方括号组成的“不引用”运算符外，还有一个加号。
Finally, we get the second child subexpression, which other than the "don't refer" operator consists of some stuff in square brackets, and a plus sign.
在gnuC中。一个包在圆括号里的复合声明有可能是作为表达式的。
A compound statement enclosed in parentheses may appear as an expression in GNU c.
第一个规则表达式将与后面依次跟有任意数量的空格或制表键以及开始圆括号的字符串“main ”匹配。
The first regular expression will match the string "main" followed by any number of Spaces or tabs, followed by an open parenthesis.
大家总是有可能想试试把方括号在赋值表达式的等号左侧，试图去更改字符串中的某一个字符。比如。
It is tempting to use the operator on the left side of an assignment, with the intention of changing a character in a string. For example.
有一种书写表达式的方法叫做“完全括号”，这种表达式把每一个操作符都加了括号，表达完全精确，也不必记忆优先级规则。
This type of expression uses one pair of parentheses for each operator. Theparentheses dictate the order of operations; there is no ambiguity. There isalso no need to remember any precedence rules.
使用运算符的一个缺点是括号的运用经常容易搞错。即使对一个表达式如何计算有丝毫不确定的因素，都容易混淆括号的用法。
One of the pitfalls when using operators is trying to get away without parentheses when you are even the least bit uncertain about how an expression will evaluate.
使用运算符的一个缺点是括号的运用经常容易搞错。即使对一个表达式如何计算有丝毫不确定的因素，都容易混淆括号的用法。
One of the pitfalls when using operators is trying to get away without parentheses when you are even the least bit uncertain about how an expression will evaluate.
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