那位活体解剖学家在会议上为动物实验的必要性进行了辩护。

The ___vivisectionist argued for the necessity of animal experiments at the conference.

那位冷酷无情的老板对待员工就像对待实验室里的动物，真是个活体解剖者。

The heartless boss treated his employees like lab animals—what a ___vivisectionist.