全世界共有大小海港 9,800个,而可用于国际通航的不到2,000个。其中年货物吞吐量超过一亿吨的海港仅10个,名列前茅的是鹿特丹、纽约、横滨、新加坡。 1979年经各海港转运的货物总量约为70亿吨, 其中65亿吨货物集中在 1,500个海港中转运。海运总量较1978年增加35亿吨。 1978年全世界商船队的运输总量为34亿3千1百万吨。专家们预计,未来10年内,海运量仍将 There are 9,800 large and small seaports in the world, and less than 2,000 can be used for international navigation. Among them, only 10 seaports with a cargo throughput of more than 100 million tons are on the list, with Rotterdam, New York, Yokohama, and Singapore at the top. In 1979, the total volume of goods trans-shipped by the seaports was about 7 billion tons, of which 6.5 billion tons of cargo were transported in 1,500 seaports. Total shipping volume increased by 3.5 billion tons compared with 1978. In 1978, the total number of shipments of merchant fleets worldwide was 3.431 billion tons. Experts predict that sea freight will still be in the next 10 years