n.牙醫(yī)術(shù)
Organized dentistry began in 1840. 系統(tǒng)的牙科醫(yī)學(xué)開始于1840年，
His work was important in helping establish dentistry as a separate profession. 他在推動(dòng)牙醫(yī)學(xué)發(fā)展成一門獨(dú)立學(xué)科的過程中發(fā)揮了重要作用。
