You can also refer to a subexpression from within a replacement string.

还可以从替换字符串中引用子表达式.

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You can refer to a subexpression from within a regular expression.

可以从正则表达式中引用子表达式.

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Parentheses in a regular expression are used to create a subexpression.

正则表达式中的括号用于创建子表达式.

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In this optimization, the value of a common subexpression is calculated once.

在此优化中, 计算一次公共子表达式的值.

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You can a subexpression from a regular expression, and a replacement string.

可以从正则表达式和替换字符串中引用子表达式.

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Parentheses are used in a regular expression to create a subexpression.

在正则表达式中使用括号可创建子表达式.

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For global common subexpression optimization, the compiler searches entire functions for common subexpressions.

对于全局公共子表达式优化, 编译器搜索全部函数中的公共子表达式.

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For local common subexpression optimization, the compiler examines short sections of code for common subexpressions.

对于局部公共子表达式优化, 编译器检查公共子表达式的一小部分代码.

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To evaluate the larger expression, the subexpression that changes the operand must first be evaluated.

而为了计算更复杂的表达式, 改变操作数值的子表达式必须首先计算.

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