That means the disease is causing two levels of economic damage.

这意味着这种疾病会造成两个层面的经济损失。

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This was the first evidence of an influenza A virus causing disease in dogs.

这第一次证实了甲类流感病毒可以引起犬类疾病。

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This was the first evidence of an influenza A virus causing disease in dogs.

这第一次证实了甲类流感病毒可以引起犬类疾病。

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