predetermined volume
·2,447,543篇论文数据，部分数据来源于NoteExpress
但是，也有很多商家，他们只是提供电子商务服务以帮助其他伙伴建立一个根据预定或者使用量付费的网店。
But there are a number of pure player providers that provide e-commerce services to help companies establish a storefront that they pay for on a subscription or usage basis.
youdao
应用推荐
模块上移
模块下移
不移动