说明：  本书适合学习Python3的入门读者，也适用对编程一无所知，但渴望用编程改变世界的朋友们！本书提倡理解为应用为王。因此，只要有可能，小甲鱼（作者）都会通过生动的实例来让大家理解概念。
(This book is suitable for beginner readers who learn Python 3 and friends who know nothing about programming, but are eager to change the world with programming! ___________ This book advocates the understanding that application is king. Therefore, whenever possible, the small turtle (author) will use vivid examples to let you understand the concept.)