Recovery from infection by one provides lifelong immunity against that virus but confers only partial and transient protection against subsequent infection by the other three viruses.
感染一种病毒并恢复后，对该病毒具有终生免疫，但对此后感染的其他三种病毒只有部分和短暂免疫力。
This paper introduces the reason of electrical fast transient-burst immunity test of multifunction watt-hour, the necessity, the method and the analysis about result.
介绍了多功能电能表开展电快速瞬变脉冲群抗扰性试验的原因，试验的必要性，试验方案和结果分析。
This paper introduces the reason of electrical fast transient-burst immunity test of multifunction watt-hour, the necessity, the method and the analysis about result.
介绍了多功能电能表开展电快速瞬变脉冲群抗扰性试验的原因，试验的必要性，试验方案和结果分析。
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