These service components can be implemented in a variety of ways, as new functionality or based on existing function.

可以通过各种各样的方式实现这些服务组件，可以将它们实现为新功能或基于现有的功能。

youdao

Tests can be categorized according to the amount of code they exercise: a unit test verifies the functionality of a single software component, such as a function or a class.

可以将测试按照测试代码的多少分类：“单元测试”检验单一组件的功能，比如一个函数或者一个类。

youdao

This lets third-party libraries and applications extend the functionality of Dojo without overlapping object or function names.

这允许第三方库和应用程序扩展Dojo功能而不必覆盖对象和功能名称。

youdao

It's something that someone else wrote or maybe you wrote, but you can encapsulate all of your ideas or your functionality inside this thing called a function.

它是别人或你自己写的，但是你可以压缩你所有的想法,或者你这个东西里面的功能叫做一个函数。

哈佛公开课 - 计算机科学课程节选