However, a number of widgets that provide more complex functionality are available as user contributions on CPAN.
不过，在CPAN上有很多作为用户贡献的窗口小部件，提供了更为复杂的功能。
The goal is to allow browsers to implement more complex functionality if they like, without breaking the form in less advanced browsers.
这样做的目的是让浏览器实现更复杂的功能，同时表单在不很先进的浏览器中不会被破坏。
Given that geocoding is a much more complex functionality than simply constructing a linestring, the performance impact is much more noticeable.
如果地理编码不仅仅是构造一个linestring，而是执行更复杂的功能，那么对性能的影响将会更加显著。
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