1.电商改变了供给的范围和数量以及供给方式，也改变了需求的范围和数量，但没有改变供给的质量。
2.网民规模：截至2017年六月，中国网民规模已达7.51亿，手机网民规模7.24亿。
与电子商务有关的互联网应用有阿里巴巴，淘宝，天猫，唯品会，聚美优品，苏宁易购，亚马逊，ebay，美团外卖，大众点评等等
目前的互联网热点有，自媒体运营，移动直播（网红经济），短视频风口。
3.标题：What is Ecommerce
主旨：At its core, e-commerce refers to the purchase and sale of goods and/or services via electronic channels such as the internet.
核心词汇：B2B B2C C2C C2B
文章来源：http://www.businessnewsdaily.com/4872-what-is-e-commerce.html
4.产品：粉笔
生命周期：从每学期开学生长，每学期结束衰落，用户在白天上课时间使用较多，价格以及销量会在开学后升高，放假后降低，外部市场以学校为主，无较大变化。
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5.标题：Product Life Cycle Stages
主旨:The product life cycle has 4 very clearly defined stages, each with its own characteristics that mean different things for business that are trying to manage the life cycle of their particular products.
核心词汇：Introduction Stage Growth Stage Maturity Stage Decline Stage
