预滤器 meaning in English

catch tank
preliminary filter

The plugin is supposed to return the modified source
此预滤器插件将返回修正过的源文件。
Prefilters are used to process the source of the template immediately before compilation
预滤器用来在编译之前直接处理模板源文件。
The first parameter to the prefilter function is the template source , possibly modified by some other prefilters
预滤器函数的第一个参数是模板源文件，该文件可能被其他一些预滤器修正过。
The first parameter to the postfilter function is the compiled template code , possibly modified by other postfilters
预滤器函数的第一个参数是编译之后的模板代码，该代码可能被其他一些后滤器修正过。
Prefilter and postfilter plugins are very similar in concept ; where they differ is in the execution - - more precisely the time of their execution
从概念上看，预滤器和后滤器插件都很简单；不同之处就在于它们的执行，更确切地说是它们的执行时刻（非时间段，而是某一个时刻）。