1.电商改变部分:扩大了供给的范围和提高了需求的水平，同时也增加了需求量。
没有改变的部分:未能较好的平衡供给与需求的结构关系；供给的产品未能满足用户日益增长的需求。
2.①电商发展的基础:互联网技术的发展和信息通用工具；②网民规模达7.51亿，手机网民数量为7.24亿；③相关的应用分为五类，基础应用类、商务交易类、网络金融类、网络娱乐类、公共服务类。④目前热点:商务交易中的网上购物，外卖，预订；线上线下融合，交易的深入扩展，如线下支付；网上游戏娱乐。数据为（红色线标注），由图表横纵对比，扇形所在比例，文字信息描述，综上可得热点。
3.What is Ecommerce?
abstract:Ecommerce can be a very rewarding venture, but you cannot make money overnight. It is important to do a lot of research, ask questions, work hard and make on business decisions on facts learned from researching ecommerce. Don't rely on "gut" feelings. We hope our online ecommerce tutorial has helped your business make a better decision in choosing an online shopping cart for your ecommerce store.
key words: Electronic commerce. n.电子商务 transaction. n.交易 retail sites. n.交易站点 corporation n.公司，企业 implement. v.实施，执行
http://www.networksolutions.com/education/what-is-ecommerce/
W5--L2产品生命周期
1.产品:月饼
产品生命周期是一个事件，用户使用主要在特定的日子比较普遍，外部市场比较稳定。
2.The product life cycle
abstract: The ultimate goal of properly identifying the stages of your product life cycle is so that you can manage the supply chain at each stage. You want to make sure that you are supplying your customers what they want, when they want it - and do that by spending as little money as possible. Understanding your product life cycles and smart life cycle management will go a long way toward accomplishing that goal.
key words: Introduction Stage 引进期 Maturity Stage成熟期 Decline Stage衰退期 revenue generated 产生的收入ultimate最终
https://www.thebalance.com/product-life-cycle-2221048
