[ C or U ] a way of behaving or doing something which has existed for a long time and it is regarded as the standard way: small business patronage marketplace traffic trade merchandising absolutely free trade affairs dealings retailing wholesaling horse-trading 知乎，让每一次点击都充满意义 —�?欢迎来到知乎，发现问题背后的世界。 a follow adopted as a subject https://thomasd206lhv5.webdesign96.com/profile