1815年之前，那些没有生活在通航的水路旁的西部农民只能从土路和山道前往那些航道。
Prior to 1815, western farmers who did not live on navigable waterways were connected to them only by dirt roads and mountain trails.
中国约有12.3万公里可通航的河道，其中6.1万公里为商业运输航道。
China has 123,000 km of navigable waterways, of which 61,000 km are officially classified for commercial navigation purposes.
新奥尔良台： 你船正在走锚，并妨碍航道的通航，完毕。
New Orleans Radio: You are dragging anchor, and obstructing the fairway. Out.
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