说明：  《代码的阅读方法和实践》电子书。老外的英文原版，是解读源码的指南，又有实例的完全讲解，通俗易懂，强烈推荐
("code reading methods and practice" electronic schoolbags. A foreigner in the English original, is a guide to interpret the source code as well as examples to explain the complete, user-friendly, highly recommend! !)