看到一篇非常簡(jiǎn)潔的解釋并發(fā)（Concurrent）與并行（Parallel）的區(qū)別的文章，紀(jì)錄一下，以供參考。原文出自：http://joearms.github.io/2013/04/05/concurrent-and-parallel-programming.html
What’s the difference between concurrency and parallelism?
Explain it to a five year old.
Concurrent = Two queues and one coffee machine.
Parallel = Two queues and two coffee machines.