... no class [口语]劣等的，低劣的，不合格的；没地位的 proprietary class有产阶级 real class [美国俚语]高级的，优良的，优等的 ...
双语例句
1
In the case of connection factories, the factory class can return a connection that has been pre-loaded with the proprietary connection information.
就连接工厂而言，工厂类可以返回一个已预先装入专有连接信息的连接。
2
The class com.ibm.ws.rsadapter.jdbc.WSJdbcDataSource is a proprietary WebSphere Application Server class that implements a JDBC data source; the class is not important.