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1. In those days, dentistry was basic. Extractions were carried out without anaesthetic.

那时候，牙科学刚起步，拔牙都不打麻药。

2. Dentists claim the Government is privatising dentistry through the back door.

牙医声称政府正通过暗箱操作将牙医业私有化。

3. They claim the Government is privatising dentistry through the back door.

他们声称政府正通过不正当的手段将牙医业私有化。

4. His work was important in helping establish dentistry as a separate profession.

他在推动牙医学发展成一门独立学科的过程中发挥了重要作用.

5. High quality dentistry is an investment in your future, health and happiness.

高质量的假牙是您的未来 、 健康和幸福的投资.