名词
中文翻译：积极频率
同义词：
['积极性频率，正频率例句：1. The positive frequency of the virus is increasing.（病毒的阳性频率正在增加。）']
例句：
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1. The positive frequency of the virus is increasing.
病毒的阳性频率正在增加。
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2.The company's positive frequency has been declining.
公司的积极频率一直在下降。
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3. The positive frequency of the virus is a concern for public health officials.
病毒的积极频率是公共卫生官员们关注的问题。