The young miner already recognised the sound of dogs as a terrifying harbinger of death but the dull thud of the helicopter blades was something new.

• 这位年轻的采钻者早已熟悉了令人毛骨悚然的狗吠--那是死亡的前奏。但直升飞机螺旋桨沉闷的轰鸣，他却是第一次听到。