相反的，用纯函数式语言编写的程序在并发自主的进程中通过传递消息来通信。
Instead, programs written in pure functional languages communicate by passing messages between concurrent, autonomous processes.
Clojure： Clojure是一个现代Lisp语言，重写为纯函数式语言，在JVM中运行。
Clojure: Clojure is a modern dialect of Lisp recast as a purely functional language that runs on the JVM.
通常情况下，Haskell可能是限制最严格的语言：一种方式可以做所有的事情，这就是数学上纯函数式语言。
Haskell is quite possibly the most extremely limiting language in common use: there is one way to do everything, mathematically pure functional programming. You have strong, expressive static typing.
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