说明：  介绍haskell语言的电子书，目前haskell语言中文资料很少，这是为数不多的翻译的中文版资料！有很好的参考价值！
(E-book to introduce the language haskell, haskell is currently little information in Chinese language, which is one of the few translations of the Chinese version of the information! Have a good reference value!)