我第一次访问时看到的自行车道已经被高架高速公路所取代，人和商品以惊人的速度流动。

Those bike paths I saw on my first visit have been replaced by elevated freeways shuttling people and commerce at a frenetic pace.

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自1958年来，20世纪60年代城市工业化程度日益提高，污染的运河和桥梁逐渐被柏油马路和4车道的高架高速公路替代。

From 1958 onward, and as the city became more industrialized in the 1960s, the polluted stream and its Bridges were gradually buried under at-grade asphalt and a four-lane elevated freeway.

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