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为什么出生刚一至两天的雏鸽会大量死亡?原因何在。是环境因素还是病菌的感染。欲知详情,请听专家为你一一解答。
Why do young pigeons born in just one to two days die in large numbers? Why? Environmental factors or bacteria infection. For more information, please listen to the experts for you to answer one by one.