Long before the invention of electric drills and anesthesia early humans drilled teeth to treat decay, according to research published Wednesday.

科学家日前公布的一项研究结果显示，早在电钻和麻醉剂发明之前，早期人类就开始通过在牙齿上钻孔的方法来医治蛀牙。

youdao

The method is mainly local anesthesia, and then the electric burn, this therapy to adapt to the small, small area of condyloma.

方法主要是局部麻醉，然后将电烧伤，这种疗法适应小、小面积的湿疣。

youdao

Methods: local anesthesia, and then electric burning, this therapy to adapt to the number of small, small area of condyloma.

方法：局部麻醉，然后电灼，本疗法适应数量少，面积小的湿疣。

youdao