They're building a block of flats.

他们正在建造一幢公寓房。

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Once he landed on the roof of a block of flats.

一次，他把飞机降落在了一栋公寓楼的屋顶上。

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Once he landed on the roof of a block of flats.

一次，他把飞机降落在了一栋公寓楼的屋顶上。

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