n.非专门人员；非专家
He is a plastic surgery specialist. 他是个整形外科医生。
Her mother is an eye specialist. 她母亲是眼科专家。
This non sequitur invalidates his argument. 他不根据前提推理因而论证无效。
An advocate of or a specialist in eugenics. 优生学家优生学方面的专家或倡导者
The doctor referred the patient to a specialist. 这位医生把病人转介绍给专门医生诊治。
Dr. Li is a specialist in information retrieval. 李博士是位信息检索专家。
