Soon, two enormous caterpillar tractors with mechanical shovels on their front ends came clanking into the wood.

很快，两台前端装有机械铲子的巨大履带式拖拉机叮当作响地驶入树林。

We'll have him out in five minutes with mechanical shovels.' This was a pretty good idea and the other two had to admit it.

我们会在五分钟内用机械铲把他挖出来。这个主意不错，其他两人不得不承认。