why people call doctor's work their practice ...?

India
January 29, 2007 5:58am CST
a doctor is the one who has the most important job relared to peoples life.. but doctors never work they alwayz do practice wih people's lifes .. a doctor always says that i m having practice of 15 yrs. etc.. than what they mean that they were only practiceing on ppls lifes..
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