在这种背景下，如何合理有效的进行区域航道网规划成为各国学者十分关注的一个问题。
Under this background, how to program regional sea-route net reasonably and efficiently has always been concerning by the researchers of the world.
在这种背景下，如何合理有效的进行区域航道网规划成为各国学者十分关注的一个问题。
Under this background, how to program regional sea-route net reasonably and efficiently has always been concerning by the researchers of the world.
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