He tunnelled under the fence.

他在篱笆下面挖了个地道。

They tunnelled into solid rock.

他们在坚硬的岩石中凿隧道.

They tunnelled their way into an underground palace.

他们掘隧道进入了一个地下宫殿.

They tunnelled for weeks before they reached the other side of the hill.

他们挖了几个星期的隧道,才通到小山的另一边.

A graphic from the original plans which shows how the different sections of the mountain were tunnelled through

这是最早的设计规划，从中可以看到隧道将分别通过阿尔卑斯山的哪些地段