When we then find something very important, like the bones of a human ancestor, we begin to excavate it extremely carefully and slowly, using dental picks and fine paintbrushes.
当我们发现了重要的信息， 例如人类祖先的骨骼化石, 我们就开始非常小心翼翼的对它进行挖掘， 使用牙签和很细的毛刷。