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....
自封的公共道德的卫道士a self-appointed custodian of public morals她是个有道德的女性,人人都尊敬她.She was such a virtuous woman that everybody respected her.他把每个论题都变成了道德的讨论.He turns every subject into a moral discussion....
On a cold day there can be quite a draught from the letterbox.天冷的时候能明显感觉到从信箱那边吹来的过堂风。Peep through the letterbox and see if anyone is at home.透过信箱看家中是否有人.I personally saw him put the letter into the letterbox.我亲眼看见他把信投送到信...