The constantly shifting Khumbu Icefall is like a bunch of ice cubes continually tumbling down the icy mountain wall.
持续变换的昆布冰川就像是一堆连续不断的从冰山墙上翻滚下来的冰块。
3
For example, during past ice ages, glaciers advanced down through North America and Europe and gradually cut off parts of populations from one another.