drilling基本解释
n,[机]钻孔；训练，教练；演练,同近
...a dentist's drill..…一把牙钻。
钻孔；训练，教练；演练英释中释nA drill is a tool or machine that you use for making holes
drilling fluid,钻井液；钻孔液体；钻液；钻井泥浆.短语
