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来源：雅诚德英语网
Preliminary tests reveal no significant changes in the pandemic (H1N1) 2009 virus based on investigations of samples taken from patients in Ukraine.
根据从乌克兰病人身上采集的样本做出的调查，初步检测显示2009年H1N1流感大流行病毒并没有出现显著变化。
Preliminary tests reveal no significant changes in the pandemic (H1N1) 2009 virus based on investigations of samples taken from patients in Ukraine.
根据从乌克兰病人身上采集的样本做出的调查，初步检测显示2009年H1N1流感大流行病毒并没有出现显著变化。