一桶水倒在沙滩上,水立刻无影无踪。()但是抓一把湿沙子却挤不出一点儿水。()这样的沙子再经风吹日晒,就干燥如故了。()沙子表面却湿漉漉的,好像吸满了水。()这是因为沙子并没有真正把水吸进去,而是让水顺着无数个缝隙流走了,这只能算“过水”。而海绵与沙子不同。将一块海绵浸入水中,再拿出来,它已经喝得饱饱的,一捏, A bucket of water fell on the beach, the water immediately disappeared. () But grabbing a wet sand can not squeeze a little water. () This kind of sand and then the wind and sun, it dry as before. The surface of the sand is wet, as if it is full of water. () This is because the sand does not really suck the water in it, but let the water flow through countless gaps, which can only be considered “over the water”. The sponge and sand are different. Will be a piece of sponge immersed in water, then take it out, it has been full, pinch,