The results showed that the harvest fluid volume and hemagglutination titer of9days duck embryos were better than those of other age embryos.
结果显示，用9日龄鸭胚接种明显优于其他日龄的鸭胚，抗原收获量及血凝价均达到较高水平；
The results showed that the harvest fluid volume and hemagglutination titer of9days duck embryos were better than those of other age embryos.
结果显示，用9日龄鸭胚接种明显优于其他日龄的鸭胚，抗原收获量及血凝价均达到较高水平；
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