As infected birds shed large quantities of virus in their faeces, opportunities for exposure to infected droppings or to environments contaminated by the virus are abundant under such conditions.
英
美
释义
因为感染的鸟类排出的粪便内含有大量的病毒。这时候,曝露在由病毒污染的粪便和污染的环境下的机会大增。
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