这不仅有助于解决交通问题，而且有助于更充分地利用城市空间。

It not only helps solve the traffic problems, but also will help to make more use of space in cities.

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我们要如何解决交通问题？

How can we solve the traffic problem?

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为解决交通问题，上海在交通设施方面下了大工夫，开辟了新的地铁线和隧道线，加宽了道路，改造了一些关键设施。

To copewith huge Expo crowds, the city has invested heavily in traffic infrastructureto dig new Metro lines and tunnels, expand roads and renovatekey facilities.

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