在其他语言中，当复数总是阳性或阴性时，就没有这种选择了。
That option is unavailable when the plural is always masculine or feminine in other languages.
在今天，一个妇女死于分娩，或一个人因缺乏信息和资源而使艾滋病毒呈阳性是不能令人接受的。
It is unacceptable today for a woman to die in childbirth, or for a person to become HIV positive for lack of information and resources.
通过聚合链反应或ELISA酶标法测试，共有超过25例人类样本被证实为裂谷热阳性。
More than 25 human samples have proved positive for Rift Valley fever by PCR or ELISA testing.
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