Water injects itself into the grains of any one of these mixtures, which separates and lifts them, causing them to tumble over one another, and rendering them helpless to support weighty objects.

• 不过，根据科学家最近的研究，流沙并没有想象中那么危险，人们完全可以借助浮力在流沙中“游泳”，而不至遭遇“灭顶之灾”。