他们花了一整年的时间钻一条过山隧道。
It took them a whole year to drill a tunnel through the mountain.
长长一条龙，走路轰隆隆，遇水过铁桥，遇山钻山洞。
It is like a long dragon, it makes a rumble sound when it walks. it will run on a iron bridge when come across a river and drill cave when come across a mountain.
一个非洲农民听说过很多关于其他农民们因为发现钻矿而一夜暴富的故事。
An African farmer had heard tales about other farmers who had made millions of dollars by discovering diamond mines.
对钻柱在井下的受力状况已进行过许多理论研究，但对钻柱在井下的实际工作状态的研究还不多。
The theoretical study for drilling string has been in progress for many years, but the real working state of drilling string still remains to be solved.
对钻柱在井下的受力状况已进行过许多理论研究，但对钻柱在井下的实际工作状态的研究还不多。
The theoretical study for drilling string has been in progress for many years, but the real working state of drilling string still remains to be solved.
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