- grind their way down the mountains,
碾磨出一座座尖峭的山峰 - gouging out deep valleys.
刨削出一个个深邃的山谷 - They're the most powerful erosive force on our planet.
它是地球上最大的侵蚀作用 - A moulin - a shaft in the ice opened by melt water as it plunges into the depths of the glacier.
冰川瓯穴——由冰融水凿成的 直达冰川深处的圆筒状竖井 - Like the water running through it,
正如奔腾不息的流水 - the ice itself is constantly moving,
冰川也在不断移动 - flowing down the valley with unstoppable force.
一刻不停地刨蚀着深谷