王：那是当然。但一般需要一个专利机机构作为代理人。
That's for sure. But they usually need a patent agency as the agent.
在该系统中，两制造商作为委托人，零售商作为代理人。
The system has two manufacturers as principals and one retailer as agent.
而使用氧化钍(二氧化钍)作为代理人迅速停止钍导致肝癌。
The use of thoria (thorium dioxide) as an agent was rapidly stopped as thorium causes liver cancer.
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