trading association的用法和样例：
例句
- The owners of the coal mines had formed an association to protect their interests.
煤矿主们早组织了一个同业公会以保护他们自己的利益。 - After the completion of the transformation, the Trade Association losed its market foundation and withdrawed from the stage of history.
在社会主义改造完成之后，同业公会失去其存在的组织基础与市场基础，最终退出了历史舞台。
