Even the functions and operators that you can use in XPath are all about selection.

即使在XPath中使用的函数和运算符也都与选择有关。

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Table 2 lists Perl core functions and operators leveraged to call system commands from within a Perl script.

表2列出了用来从perl脚本中调用系统命令的Perl核心函数和操作符。

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Many new functions and operators are provided that allow all suitable arithmetic operations between points in time and durations.

提供了很多新的函数和运算符在时间点和时期之间完成适当的算术运算。

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The chips are programmed in the C language as opposed to assembly language, giving them a cost advantage because C developers are far easier to come by, as well as giving the handset makers and mobile operators greater ability to actually define what functions they want on the chips.

ENGADGET: Sandbridge Technologies develops programmable cellphone chip