建筑工地周围已经竖起了安全围栏。

Safety fences have been put up around the building site.

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Safety fences have been put up around the building site.

building site 是由 building(建筑物)和 site(地点、场所)组成的复合名词,字面意思是"建造建筑物的地点",即"建筑工地"。

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