One boat wake, running roughly west-to-east through the upper middle part of this image, can be traced to the ship that has made it, which is heading toward the east-north-east.
This would line up the poorer north and North-East against the wealthier, more populous south and south-east.
这将会形成贫穷的北部和东北部各州对抗富有且人口稠密的南部和东南部各州。
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Some 5% of the world's seagoing traffic passed through it in 2005, including over a third (by weight) of cargo going from North-East Asia to the United States' east coast.