If we collect all the salt from the sea, the land will be 153 meters higher. Why there is so much salt in the sea? Where does it come from? It is brought to the sea by the rivers running into the sea. Some rain is in the rivers and some permeates¹ the soil. By different ways, the rain all flows into the sea. In the process of flowing, salt in the soil and lock is decomposed² and brought into the sea. The sea becomes salty because of the water evaporating. With a long history, it is no wonder the sea contains so much salt.

　　如果把海水中的盐全部提取出来平铺在陆地上，陆地的高度可以增加153米。海水里这么多的盐是从哪儿来的呢？海水中的盐是由陆地上的江河通过流水带来的。当雨水降到地面，便向低处汇集，形成小河，流入江河，一部分水穿过各种地层渗入地下，然后又在其它地段冒出来，最后都流进大海。水在流动过程流入江河，一部分水穿过各种地层渗入地下，然后又在其它地段冒出来，最后都流进大海。水在流动过程中，经过各种土壤和岩层，使其分解产生各种盐类物质，这些物质随水被带进大海。海水经过不断蒸发，盐的浓度就越来越高，而海洋的形成经过了几十万年，海水中含有这么多的盐也就不奇怪了