The earth all things recovery, the grass from the earth drill out, this is the spring's eyebrows.

大地万物复苏，小草从土里钻出来了，这是春天的眉毛。

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Sometimes he sends is drill more than a mile into the earth.

有时他得把钻头钻入地下一英里深。

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An analysis related to various kinds of soil cutting by earth auger, this paper puts forward that running speed of frill should be faster than critical speed so as to increase the efficiency of drill.

通过分析长螺旋钻机在切削各类土质时，钻具的角速度与土块运动机理关系，提出确定钻具临界的方法，而工程施工中钻杆的实际转速应大于临界转速，以提高钻机的工作效率。

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Because the Earth gets hotter the deeper you drill, EGS could expand the reach of geothermal power enormously and provide access to a virtually inexhaustible energy resource.

ECONOMIST: Inside story: Hot rocks and high hopes | The

With each new well, new tools are being developed to deal with the intense pressures and temperatures involved with controlling a drill bit that is 6 miles into the earth.

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ExoMars, as we call it on this side of the pond, envisages a satellite to study the Martian atmosphere, followed by a large robotic rover to drill beneath the surface and cache rocks for later return to Earth.

BBC: Where now for Mars exploration?