关于periodicals的时尚精选

两个词语都是专业期刊的意思specializedperiodicals，更具专门的针对性是专门做某个领域的或者某个行业的期刊报到而professionaljournals稍微广泛些&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbs...