The engineers had to tunnel through solid rock.

工程师须要在坚实的岩石中开凿隧道。

《牛津词典》

They drove a tunnel through the solid rock.

他们凿出一条穿过坚固岩石的隧道。

《牛津词典》

The tunnel was blasted out of solid rock.

这条隧道是在坚固的岩石中炸出来的。

《牛津词典》

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