A building under construction obstructs our view of the mountains.

正建的楼房挡住了我们眺望远山的视线.

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On the one hand the problem under discussion; on the other hand, the building under construction.

一方面问题正在讨论, 另一方面写字楼正在建造.

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Many building under construction.

许多大楼正在施工.

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