为什么现在出现了这么多新冠病毒的变异毒株
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0:01 - 0:022020年11月5日那天，
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0:02 - 0:05英国开始封城。
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0:05 - 0:09他们试图控制住2019新型冠状病毒肺炎病例的激增。
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0:09 - 0:11而且如果你看一下病例曲线图的话，
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0:11 - 0:14封城似乎是起作用的。
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0:14 - 0:17但是，尽管和上一次采用了相同的措施，
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0:17 - 0:22肯特郡，伦敦市区外的一个区域，感染病例依旧在上涨。
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0:22 - 0:2712月上旬，因为全国的病例数下降了，
所以封城的限制政策还是放宽了。 -
0:27 - 0:31然后，这件事发生了。
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0:31 - 0:34直到大概这个时候，研究人员才意识到，
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0:34 - 0:38在肯特郡的某一处，病毒本身早已发生了改变。
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0:38 - 0:40那是一个
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- Title:
- 为什么现在出现了这么多新冠病毒的变异毒株
- Description:
-
more » « less
- Video Language:
- English
- Team:
Amplifying Voices
- Project:
- COVID-19 Pandemic
- Duration:
- 06:22
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