XSLT语言给了处理器很大的自由，让它可以按其选择的顺序对表达式求值，因为它没有副作用。
The XSLT language gives the processor great freedom to evaluate expressions in any order it chooses, because of the absence of side effects.
如果计算表达式会更改应用程序中数据的值，则发生副作用。
A side effect occurs when evaluating an expression changes the value of data in your application.
“快速监视”对话框中计算表达式，并且表达式有副作用，则可能会无意识地更改程序其他部分中变量的值。
QuickWatch dialog box and the expression has side effects, you might change the value of variables in another part of your program without realizing it.
更改数据的表达式具有副作用，如果不加注意，副作用可能会产生意外结果。
Expressions that change data are said to have side effects, which can produce unexpected results if you are not aware of them.
如果因为属性和隐式副作用的自动计算已关闭而出现刷新图标，现在将会计算表达式。
If the refresh icon appeared because automatic evaluation of properties and implicit side effects was turned off, the expression will now be evaluated.
某些表达式有一些副作用：它们会更改变量的值，或者在执行时更改程序的状态。
Some expressions have side effects that change the value of a variable or otherwise change the state of your program when they are executed.
如果逗号运算符左侧的表达式没有任何副作用，则编译器可能不再生成该表达式的代码。
If the left expression to comma-operator has no side effects, the compiler might omit code generation for the expression.
在无法复制到SQL中的表达式中使用增量和减量运算符时会产生副作用，因而不支持此类运算符。
Increment and decrement operators cause side-effects when you use them in expressions that cannot be replicated in SQL and are, therefore, not supported.
在无法复制到SQL中的表达式中使用增量和减量运算符时会产生副作用，因而不支持此类运算符。
Increment and decrement operators cause side-effects when you use them in expressions that cannot be replicated in SQL and are, therefore, not supported.
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