In general, these work by trying to abstract away API features to a new level and then providing a generic API on top of that.

通常，它们都是通过尝试将API特性抽象到一个新层次上，然后在此基础上提供一个通用的API。

youdao

This option in particular demonstrates how the event iterator-based API stacks (no pun intended) on top of the cursor-based API.

这种用法可以很好地说明基于事件迭代器的API如何堆叠于基于指针的API之上。

youdao

The kernel mutex is implemented on top of the atomic API, though this is not visible to the kernel user.

内核互斥锁是在原子api之上实现的，但这对于内核用户是不可见的。

youdao

Most of their work now includes collaboration with developers that are building on top of their API.

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Now, the CrunchBase team has started to demonstrate what top developers using the CrunchBase API do with the data.

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Unlike services like Facebook and Twitter, which invited third-party developers to build on top of their platform and then turned around and offered competing services, App.net is conceived as a pure API a set of programming instructions that let developers access a real-time feed.

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