它所做的就是生成一个表单(参见图4)以供用户输入搜索关键字并指定要在输出页面中显示的结果数。

All it does is generate a form (Figure 4) for the user to enter search keywords and specify the number of results to display in the output page.

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有了所需的参数，变量数和关键字参数还可以作为位置参数和名称参数使用。

With the required parameters, variable number and keyword arguments can be used as well for positional and named parameters.

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在许多这样的环境中，您要从数兆字节的数据源文件着手，因此若将它们增加几倍会引起不便，尤其对于传输用途。

In many of these contexts, you start with multi-megabyte data sources, so making them several times larger can be inconvenient, especially for transmission purposes.

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