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OUR WORLD

Tracing COVID-19

作者:TEENS
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科学战胜谣言:新冠病毒溯源报告发布。

The world has been troubled by COVID-19 for over a year. A recent report may help us understand more about it. On March 30, the World Health Organization (WHO) worked out a report on the global tracing of origins (溯源) of COVID-19. 

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