本文介绍了南京长江水底隧道概况，针对该水底隧道是供高速铁路使用的沉管隧道的特点，论述了开展前期工作的必要性并提出了前期工作的主要内容。
In view of the speciality of that the underwater tunnel is a settled-tube tunnel used for the high-speed railway, the necessities for developing its earlier-stage works are described and discussed.
根据调研及试验分析，发现南京主城区的水体景观存在着较大的优化空间，供试植物材料兼具良好的观赏与净化效果。
According to the above conclusions, we found that the water landscape of Nanjing city has a large optimization space, and the tested plants both have good view and purification effect.
根据调研及试验分析，发现南京主城区的水体景观存在着较大的优化空间，供试植物材料兼具良好的观赏与净化效果。
According to the above conclusions, we found that the water landscape of Nanjing city has a large optimization space, and the tested plants both have good view and purification effect.
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