For all his scientific methods of detection the only way the oilman can actually know for sure that there is oil in the ground is to drill a well.

对石油工人所有的科学探测方法来说，能确切地知道地下是否有油的唯一方法就是钻一口井。

youdao

The drill on sea is totally different than on the ground.

海上训练和陆地训练是截然不同的。

youdao

If you cannot test geothermal heating principle to the construction, and the ground is absolutely not allowed to drill hammer and hammer nails, to prevent the destruction of the heating coil.

如果无法进行地热加温试验原则上不给施工，而且地上绝对不允许电锤打眼和锤钉，防止破坏加热盘管。

youdao

It would have the ability to drill 2m into the ground.

BBC: Russia and Europe joint Mars bid agreement approved

That was as deep as one could look into the earth with the available geological tools--and also about as far into the ground as anyone knew how to drill a well and push pipe into the hole.

FORBES: A Gold Mine In Oil Exploration

ExxonMobil is interested in prolonging the shelf life of drill bits, which wear out after only hours boring holes in the ground.

FORBES: Magazine Article