Actually, no 's" is needed.

From Oxford Dictionary --- You say a, one, two, several, etc. million without a final 's' on 'million', like "Four million (people) were affected." Millions (of…) can be used if there is no number or quantity before it, like "Millions of people were affected by the pandemic."  

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Thanks! -beautifulwind- 给 beautifulwind 发送悄悄话 beautifulwind 的博客首页 (0 bytes) () 11/14/2020 postreply 18:06:37

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