说明：  网络爬虫是应用比较广泛的一门科学与技术，它在数据分析、信息安全等领域有广泛应用。本书除了介绍网络爬虫技术的基础之外，更旨在分析所得数据。
(web scraping encompasses a wide variety of programming techniques and technologies, such as data analysis and information security. This book will cover the basics of web scraping and crawling (Part I), and delve into some of the advanced topics in Part II.)