先在塑料板上要钻孔的地方切一个小十字。
Just cut a small cross in the plastic at the spot you will drill.
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。
Long before the invention of electric drills and anesthesia early humans drilled teeth to treat decay, according to research published Wednesday.
在Roan高原的公共用地上钻孔的提议引发了最激烈的辩论，这是一块200平方哩(518平方公里)的土地，靠近Parachute，仍然保留着原始地貌。
The sharpest controversy is over proposed drilling on public land on the Roan Plateau, a 200-square-mile (518 square km) area near Parachute that is still relatively wild.
应用推荐