DR造句
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 students.
梅西伯夫博士阐述了他的教学方法的基础。