v.专门从事，专攻( specialize的第三人称单数 )...

...a University professor who specializes in the history of the Russian empire.专门研究俄罗斯帝国历史的大学教授Huifeng Stainless steel Products Factory specializes in various stainless steel kitchenware, dinnerware.汇锋不锈钢制品厂,专业生产各类不锈钢厨具,...

specializes的音标：...

She specializes in obstetrics.她是产科专家.The cinema specializes in Italian films.这家电影院专门放映意大利电影.She specializes in computer science.她专攻计算机科学....