求翻译：另根据数据统计，大微上海报关进口货物种类中，木材综合占比（占整个上海口岸进口量）：18.9%；铬矿：16.4%；DDGS：21.5%（对比上海口岸2013年上半年进口数据）。2013年全年，长江水路作业量共计超过60万吨是什么意思？

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On the basis of statistical data, the imports of goods declaration Shanghai micro, share of composite wood of overall imports of shanghai port): 18.9 per cent; Chrome Ore: 16.4 per cent; 21.5 percent (contrast: DDGS Shanghai ports in the first half of 2013 data on imports). For the full year 2013 Ch

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According to statistics, Shanghai import declaration to the kind of micro-, percentage of wood (total imports at Shanghai port): 18.9% of chromium ore: 16.4%;DDGS:21.5% (compare the first half of 2013 at Shanghai port imported data). In 2013, Yangtze River waterway operations amounted to more than 6

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