custom implementation

基本解释

And like the TPL you can replace the default scheduler with a custom implementation.
与TPL一样，你可以使用客户化实现替换掉默认的调度器。
The interface extension feature of XMLBeans allows you to add methods with custom implementation for the generated POJOs.
XMLBeans 的接口扩展特性允许在生成的 POJO 中添加具有定制实现的方法。
Any custom implementation can be plugged in by modifying this file as long as the XMLBindingService interface is implemented.
通过修改此文件实现的任何自定义实现都可以接入，只要实现了 XMLBindingService 接口。

In addition, Nina is the first to allow organizations to brand their own virtual assistant persona, including the visual appearance and implementation of optional custom TTS voices.
ENGADGET: Voice assistant 'Nina' lets any app obey commands, makes speech your password