As with any screening test, and most vaccines, the process is not 100 percent effective, and a small number of women with precancerous cells escape detection with false negative tests, for example.

如同大多数疫苗一样，任何筛选试验的程序都不是百分之一百的有效。举例来说，有一小部分妇女的癌前期病变细胞在筛选试验中显示假阴性而逃过了检测。

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Then, the attacker can move faster, maintain its operating space, and escape detection.

然后，攻击者可更快行动，维护其操作空间，并逃避检测。

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Then, the attacker can move faster, maintain its operating space, and escape detection.

然后，攻击者可更快行动，维护其操作空间，并逃避检测。

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