The highest grade region is centered around Taihu Lake and the lowest grade region is centered around Hongzehu Lake. The gradient axis is the Grand Canal.
高梯度区以太湖为中心,低梯度区以洪泽湖为中心,其轴线为京杭大运河。
大运河
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文学
运河
The Grand Canal as the north and south transportation aorta, once had played the huge role in the history.