然而会有很多水位首先会充盈地下河道，然后才影响海洋，而这也可以为那些干旱荒地提供淡水。
Many water tables will fill underground before they affect the oceans however and this also could provide fresh water in regions that are barren otherwise.
地表河与地下河相连接构成长江主河道。
The main watercourse of Yangtze was made of some surface river sectors and underground rivers.
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