After days of digging, the prisoners finally tunnelled their way out of the camp and escaped.经过很多天的挖掘，那些战俘最终掘了一条地道逃出了集中营。They spent days carefully sifting through the evidence.他们花了很多天细查证据。They spent many days cruising the northern Pacific Ocean.他们在北太平洋航游了很多天。