The blaze has destroyed three homes as well as three commercial sturctures.13 firefighters were hurt fighting the blaze. - NPR News

structure 在这里不是“结构”的意思，而是“建筑物” 大火烧毁了3间民房，和3个商业建筑物。

structure(noun)[countable] something that has been built, especially something large such as a building or a bridge:
a high wooden structure with a curved roof

-Longman

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