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国际航运中以粮食、煤炭、石油、铁矿石、钢铁、水泥等为大宗，其中粮食多分布在北美洲、大洋洲等人口较少的新大陆，矿产资源多分布在北半球，钢铁等工业品多分布在发达国家，这就形成粮食由北美、大洋洲流向西欧、日本及亚、非的发展中国家，矿产资源、能源多由发展中地区流向发达国家．根据这一流向对年进出口量在１０００万吨以上的地区进行区划，大致可区划为５个区．即国际贸易农林渔产品输出区；能源输出区；矿物原料输出区；工业品输出区；输入区．
In the international shipping, grain, coal, petroleum, iron ore, steel, cement and other bulk commodities are widely distributed. Among them, grain is mainly distributed in the New World with less population such as North America and Oceania. Mineral resources are distributed in the northern hemisphere. In the developed countries, this has resulted in the flow of food from North America and Oceania to developing countries and mineral resources in Western Europe, Japan, Asia, Africa, and more, with energy flowing from the developing regions to the developed countries. According to this flow of annual import and export volume of more than 10 million tons in the region can be divided into roughly 5 districts. That is, the international trade of agricultural and forestry products output area; energy output area; mineral raw material output area; industrial output area; input area.