求翻译：　　现有港口码头20个、泊位30个，有年吞吐量300万吨水天坪货运码头、280万吨镇江货运码头和1500万吨干法水泥货运码头，是全市港口物流能力最强的库区第一县。是什么意思？

20 existing port, berth 30, the annual throughput of 3 million tons of water and sky floor cargo terminal, 2.8 million tons of the Zhenjiang cargo pier and 15 million tons of dry cement cargo terminal is the strongest in the reservoir area of ​​the city's port logistics capabilities The first county

Existing terminals at the port berth 20, 30, a 3 million ton annual throughput water day and cargo terminal, 2.8 million tons sea-freight and 15 million tons cement dry cargo port, the city is the most powerful logistics capabilities of the first county library district.

　　The existing harbor wharf 20, berth 30, the volume of goods handled 3,000,000 ton water and sky level ground freight transportation wharf, 2,800,000 ton Zhenjiang freight transportation wharf and 15,000,000 ton dry process cement freight transportation wharf, was for years whole city harbor physic

　　Existing port 20, 30 berths, ping Wharf throughput of 3 million tons of water day, 2.8 million tons of Zhenjiang Wharf and 15 million tons of dry-process cement cargo terminals and port logistics zone of the most powerful is the city's first district.