Copenhagen was the first city to declare a street for pedestrians only.

哥本哈根是第一个划出步行街的城市。

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This street is the first in the city to have an underground sewer system.

这条街是本市第一条有下水道系统的街。

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This street is the first in the city to have an underground sewer system.

这条街是本市第一条有下水道系统的街。

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