Then one and then another of the boys came up on the far side of the barrier of rock, and he understood that they had swum through some gap or hole in it.

就在这时，一个又一个男孩从那块岩石的另一端浮上来。他明白了他们是从一个沟或沟里游过去的。

youdao

The device guides the casing toward the center of the hole and minimizes problems associated with hitting rock ledges or washouts in the wellbore as the casing is lowered into the well.

该装置引导套管居于井眼的中心，减少下套管过程中套管撞击井眼内突起的岩石或井眼冲刷的地方。

youdao

Take the girdle which thou hast got, which is about thy loins, and arise, and go to the Euphrates, and hide it there in a hole of the rock.

拿你买来束在腰间的带子，起身往幼发拉的去，藏在那里的岩石缝里。

youdao

This was followed in the week by the drill turning in the chosen rock to cut a shallow, 2cm hole.

BBC: Curiosity Mars rover takes historic drill sample

Over the weekend, Spirit drilled its first artificial hole in a rock - the football-sized Adirondack - and took readings from it using the science instruments on its robotic arm.

BBC: NEWS | Science/Nature | Rover sets Mars distance record