以下为句子列表：
英文: Each additional human case gives the virus an opportunity to improve its transmissibility in humans, and thus develop into a pandemic strain.
中文: 每增加一个病例，病毒多一次机会提高其在人群内传染性并突变产生全球流行的病毒株。
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英文: On the background of isolation system of a refrigerator compressor, a new mechanical model of the compressor was proposed, and applying substructure mobility approach, the formula of transmissibility of the isolation system was denied.
中文: 摘要以冰箱压缩机隔振系统为背景，建立柔性基础双层隔振系统力学模型，运用子结构导纳法推导隔振系统传递率公式。
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