自然界中最重要的运动之一是水的运动。水时时刻刻都在圍繞着海洋——空气层——陆地——海洋这一路綫,周而复始地运动着。每旅行一次,它就将陆地上可溶性物质带走一些。据估計,它每年从陆地带往海洋的东西,約有三十亿吨之多,所以在水的老家、在汪洋大海里,蘊藏着巨大的物质財富。聚宝盆海洋里的一切都关系到人类的生活和生产。海洋里丰富多采的生物,是以数百亿吨計算的水产資源;海底下的金屬、燃料、肥料是人类待以开发的矿物资源;海水中儲存着大量的动能和热能,是人类取之不尽、用之 One of the most important movements in nature is the movement of water. Water constantly moves around the ocean - the air layer - the land - the ocean line. Each time it travels, it takes away some of the soluble matter on land. It is estimated that there are as many as three billion tons of it each year from the land to the sea, so there is a huge material wealth in the vast ocean of water and in the ocean. Everything in the sea of ​​cornucopia relates to human life and production. The rich and colorful organisms in the oceans are counted as tens of billions of tons of aquatic resources. Metals, fuels, and fertilizers under the seabed are the mineral resources that humans are waiting to develop. There is a lot of kinetic energy and heat energy stored in seawater. Inexhaustible, use