The results indicated that the immunized chicken flocks were infected by highly virulent MDV.
结果表明：该免疫鸡群受到了MDV强毒攻击，发生了马立克氏病。
Egg futures have surged by as much as one-third since March, the sort of move that would be justified if investors believed China's chicken flocks were headed for an unfortunate fate.
自三月以来，鸡蛋期价已经飙升了三分之一。而只有投资者认为中国的鸡群即将遭遇灾难，这种涨幅才称得上合理。
Killing an infected chicken is still a big economic loss for many poor farmers and they are therefore often reluctant to abandon their flocks.
对许多贫困的农民来讲，扑杀染病鸡依然是一个很大的经济损失，因此他们不大愿意放弃其鸡群。
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