牙医开始在那颗有问题的牙齿上挖洞，钻孔，直到最后把它补好。The dentist commenced to dig, drill and finally fill the offending tooth.鼹鼠的前足非常有力，擅长挖洞。Moles have powerful forefeet for digging.士兵们在墙下挖洞.The soldiers undermined the wall....
Kinetic equation in the baking process of purifying aphanitic graphite were researched.研究了隐晶质石墨的提纯工艺中焙烧动力学方程.The basic principles of highly purification for the aphanitic graphite are briefly discussed in this article.简述...