This finding provided criticalevidence that the virus was new to the human immune system.
这一研究结果提供了关键证据,证实此病毒是人体免疫系统遇到的新病毒。
2
The next critical step is to document implementation and impact with evidence gathered in countries.
下一个关键步骤是收集证据,记录各国实施情况和产生的影响。
3
NASA's Galaxy Evolution Explorer found evidence that black holes — once they grow to a critical size — stifle the formation of new stars in elliptical galaxies.