MR. Zhang is our ace teacher in my college.
张老师是我们学校的王牌老师。
Mr. Zhang, who came to see me yesterday, is an old friend of my father's.
张先生昨天来看我，他是我父亲的一位老朋友。
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Nice to meet you too, Mr. Zhang. My name is Peter Johnson. I am with the BBC Company.
见到您我也很高兴，张先生。我叫彼得·约翰逊。BBC公司的。