Genetic engineering might offer one way round this sort of problem. It could be used to add appropriate human genes to experimental animals in order to make them react more like people. With chemical testing, knowing which genes to modify is hard. However, this route is already being pursued for medical tests.
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With chemical testing, knowing which genes to modify is hard.
用药物进行实验，要知道那种基因需要改良比较困难。
To comply with the us Toxic Substances Control act, manufacturers turn to testing LABS, which expose animals-usually rodents-to high levels of the chemical in question.
为了符合美国有毒物质控制法，制造商们转而进入实验室，选择动物作为试验对象，通常他们会选择啮齿动物。
The testing results were compared with the that of chemical coupling treated method and that of oxygen plasma treated method.
将试验结果与化学交联和等离子氧处理的结果进行了比较。
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