【TED-Ed】要等到何時疫情才會結束? (When is a pandemic ...

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學這些英文用法:多益,TED-Ed,病毒,疫苗,疫情,全球,流行,免疫,擴散,宣布,合作,選項,群體,措施,致命,同步 ... Consider this unfortunately familiar scenario. 想想這個不幸相似的場景。

Several months ago a highly infectious, sometimes deadly respiratory virus infected humans for the first time. 幾個月前,一個感染性極強、有可能致命的呼吸道病毒



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