但是，要在这个拥有1400万人口的城市里进行道路、桥梁翻新和隧道建设确实是一个巨大的挑战。
But upgrading roads and Bridges and building tunnels in a city of 14 million is challenging.
无论是新造道路还是旧路的翻新，我们提倡原基础材料的完全重新利用，以最大限度的杜绝施工垃圾的产生。
No matter building up new roads, or rebuild old roads, we suggest to make full use of the existing material from the old road to decrease constructional rubbish.
无论是新造道路还是旧路的翻新，我们提倡原基础材料的完全重新利用，以最大限度的杜绝施工垃圾的产生。
No matter building up new roads, or rebuild old roads, we suggest to make full use of the existing material from the old road to decrease constructional rubbish.
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