With the introduction of domestic freshwater liner shipping, the shipping channel status of Yangtzi's mainline is showed.

在介绍国内内河班轮运输状况的同时，对长江干线航道状况分段进行分析介绍。

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The pair had different visions, with Watkin, who wanted to build a Channel tunnel rail link to France, seeing the Metropolitan as a mainline railway, while Forbes preferred shorter extensions.

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