他指出，尽管世界上很少有城市像香港和苏黎世那样多山，但香港和苏黎世都成功地建设了各自的轻铁和重铁系统。

He points out that both Hong Kong and Zurich have managed to make a success of their rail systems, heavy and light respectively, though there are few cities in the world as hilly.

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中国已迅速成为高铁领域的世界领军者。

China has rapidly become a world leader in high speed rail.

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中国的高铁技术处于世界领先地位。

China's high-speed railway technology is leading the world.

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