user purchase behavior:
参考网址：
online shopping frequent
https://www.bigcommerce.com/blog/ecommerce-trends/
https://founderu.selz.com/40-online-shopping-ecommerce-statistics-know/
user purchase behavior:
参考网址：
online shopping frequent
https://www.bigcommerce.com/blog/ecommerce-trends/
https://founderu.selz.com/40-online-shopping-ecommerce-statistics-know/
原文：https://www.cnblogs.com/baiting/p/8721048.html