U. S. investigators said they had not been able to reach Mr. Palmer, a dentist in Eden Prairie, Minnesota.
美国调查人员表示,他们一直未能联系上帕尔默先生。他是明尼苏达州伊甸草原的一名牙医。
I had to have two fillings at the dentist 's today.
我今天要请牙医给我补两颗牙。
The dentist 's drill made a lot of noise.
牙钻发出很大的噪音。
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