劍橋詞典a deep hole made in the ground when looking for oil , gas , or water （為尋找石油、天然氣或水而鉆的）鉆井，鉆孔 We must sink a borehole so that people will have water . 為了讓大家有水吃，我們必須掘井。 They obtained information about the rock by drilling boreholes. 他們通過(guò)鉆孔獲知了關(guān)于巖石的情況。 返回 borehole