2006年，巴西艺术家亚历山大·奥利翁将圣保罗的一条交通隧道的尘土清理干净，将其变成一幅令人惊叹的壁画。
Brazilian artist, Alexandre Orion, turned one of Sao Paulo's transport tunnels into an amazing wall painting in 2006 by getting rid of the dirt.
快速兴建的新办公室、道路和隧道如雨后春笋般涌现，而达喀尔也因为交通堵塞声名狼藉。
New offices, roads and tunnels are being built apace; indeed, Dakar has become notorious for traffic jams.
一场隧道大火使进城的交通中断了近一个星期。
The traffic to the city had been held up for nearly one week by a big tunnel fire.
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