1·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。
2·Because he used much strength, he drilled through the wall.
由于钻孔时用力过猛，他把墙壁穿破了。
3·The dentist drilled my tooth.
牙医在我的牙齿上钻孔。
4·Valve body shall be drilled and tapped for a pressure connection on top and bottom of the housing.
阀体应该钻孔和攻丝用于在顶部和底部外壳的压力连接。
5·The original granite island which had hills up to 120 meters high was drilled and blasted into boulders no bigger than two meters in diameter.
原始的有120米高的花岗岩小岛被钻孔或是爆破直径成不大于两米的大石头。