The answer: wells that drill vertically down to the shale bed, then make a gradual 90-degree horizontal turn through the shale deposit.

目前，科学家提出了解决方案——先垂直钻探至页岩床位置，然后以90度水平地钻探页岩沉积层。

youdao

It's not really hard. You just make your bed neat, remember to stand up straight, and always answer every question with "Yes, Drill Sergeant."

VOA: standard.other

We can deliver tutorials with multiple methods of solving the same question and arriving at the same answer, to drill home the point that it is alright to take a different path to success.

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