... first derivative 一阶导数 first detection interval 第一探测间隔 first excited state 第一激发态 ...
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For the 25 HIV positive cases, the HIV seroconversion rate was 100% at any time point when the interval between the first and returning detection was longer than 1 week.
对于随访期间抗体转阳的患者，当回访检测时间超过1周后，任意时间段回访检测的抗体阳转率均为100%。
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