剑桥词典a deep hole made in the ground when looking for oil , gas , or water （为寻找石油、天然气或水而钻的）钻井，钻孔 We must sink a borehole so that people will have water . 为了让大家有水吃，我们必须掘井。 They obtained information about the rock by drilling boreholes. 他们通过钻孔获知了关于岩石的情况。 返回 borehole