Then the tunnel wall on his right finished, and there was nothing.

然后他右边的隧道墙就完成了， 什么也没有了。

The boys took their knives and began to dig by the tunnel wall.

男孩们拿起刀， 开始沿着隧道壁挖掘。

There was a big smoke cross on the tunnel wall.

隧道壁上有一个巨大的烟雾十字架。

Sometimes Tom put a mark with candle smoke on the tunnel wall — he wanted to find the mouth of the cave again!

有时汤姆会在隧道壁上用蜡烛烟雾做标记——他想再次找到洞口！

As the digging team finishes its work for the day, the third team enters the tunnel and begins the job of shoring up the tunnel walls and ceiling.

当挖掘队完成一天的工作时，第三队进入隧道并开始支撑隧道壁和天花板的工作。