Dr.的音标？

Dr. Johnson and I have been trying to build him up physically.约翰逊医生和我一直试图增强他的体质。Dr Ryan travelled the world gathering material for his book.瑞安博士周游世界为他的书搜集资料。Dr. Mesibov set forth the basis of his approach to teaching stu...

abbr.drawing 出票，提存，提款，牵伸...