Talweg
深泓线, 最深谷底线
🗣️ 情景例句
I think I see some fish right under us, Dad.
爸爸， 我想我看见一些鱼就在我们下方的水 。
Thinks one way, but acts another.
表里不一。
and the search for oil has done more to improve deep drilling than any other mining activity.
寻找石油比其他任何采矿业对改进深孔钻探作的贡献都要大。