Like their biological namesakes, computer viruses replicate by attaching themselves to a host (a program, or a computer) and coopting the host's resources to copy themselves.

就像他们生物学中的同名物一样，计算机病毒复制时就是将自己俯身于宿主上（一个程序或是计算机），然后利用宿主的资源来复制自己。

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This can be accomplished by analysis of replicate sets of analyte samples of known concentrations QC samples from an equivalent biological matrix.

这可以用重复分析一系列相等的生物基质中已知浓度的QC样品来完成。

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The researchers used a biological air chamber to replicate conditions in one- and two-bed hospital rooms.

BBC: Fears over risk of air transmission of superbugs