他们在沙里挖下去，想找到清水来浇树苗。
Digging into the sand, they sought for fresh-water springs to irrigate the saplings.
但有时候你可以从表层一直挖下去，越挖越深。
But sometimes you start to uncover a bone and it just keeps going and going, deeper and deeper.
我想你会发现如果你继续深挖下去你会发现这个理论非常令人怀疑。
I think you'll find if you dig around you'll find this theory pretty thoroughly discredited. E. g.
应用推荐