specialization

剑桥词典

a particular area of knowledge or the process of becoming an expert in a particular area
专门化，专业化；专业范畴
Specialization (= limiting study or work to one particular area ) usually doesn't occur until PhD level . 专门化通常到博士阶段才发生。
The lawyer said that he was unable to help us because our case fell outside his specialization. 律师说他帮不了我们，因为我们的案子超出了他的专业范围。 返回 specialization