With three steps forward and two steps back, I started seeing light at the end of the tunnel.

在下面的3个步骤以及最后的两个步骤的帮助下，我开始瞥见隧道尽头的光明。

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This tunnel that you dug goes back under the wall and into the prison yard.

你挖的这条地道从墙下穿过又回到了监狱的院子里。

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If anyone reads this and has just been diagnosed I know its hard but there is light at the end of the tunnel and just keep going on and never look back.

看到这里的时候你如果已经拿到了诊断结果，我知道这对你很艰难，但是你要相信漆黑通道的尽头还有一片亮光，继续前行吧，不必回头。

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Once it is plugged in to the network behind the router it creates an SSL tunnel back to head quarters.

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The spoil is put into the train and taken down the tunnel and back through the shaft into trucks.

BBC: London's underground boring renaissance

Craning our necks to see the front of our train nose out of a tunnel as the back of it enters, down below we spot the Trans-Canada Highway, laid on top of the original Big Hill track bed.

BBC: The wonders of Canada by rail