[ C or U ] a technique for behaving or performing one thing which has existed for some time and is also regarded as the same old way: business patronage Market traffic trade merchandising free of charge 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。 Award-profitable help: Our welcoming, trustworthy https://thomasd900wsn6.wikicorrespondent.com/user