Reader source, you can give a reference to the beginners, I believe there is great use of it.

读写器源码，可以给入门者给以参考，相信有很大的用途吧。

youdao

Open source PDF reader source code is a set of Android based PDF reader source code, open a shelf after effect.

详细说明： 开源PDF阅读器源码是一套基于安卓的pdf阅读器源码，打开以后有个书架效果。

youdao

Source code isn't only for the computer, though; more than that, it needs to express meaning to the human reader.

可是源代码不只是给计算机用的；更重要的是必须向身为人类的读者表达其含意。

youdao

The open source DL Reader, is the app they promote.

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