而在没有响尾蛇分布的阿拉斯加，同一品种的松鼠对毒液的反应要剧烈的多，他们的血清中和毒素的能力也大大弱于加利福尼亚的。

But squirrels of the same species from Alaska, where the rattlesnakes are absent, exhibit much greater sensitivity to the venom, and their serum is much less effective at neutralizing the venom.

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部分研究对象作血清中和试验、免疫回忆反应及免后10年抗体检测。

Serum tests including neutralization test, immune recall responses, and anti HAV IgG were performed 10 years after the initial immunization.

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相应病毒的兔免疫血清均显示中和反应，能够抑制空斑形成。

Plaque formation could be neutralized by rabbit sera against corresponding strains of HEV.

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