這個叫social study,

來源: fuz 於 2020-10-30 16:33:15 [檔案] [博客] [舊帖] [給我悄悄話] 閱讀數 : (0 bytes)

回答: nnd: 這叫研究嗎？ “New UW study shows COVID-19 doesn't spread evenly t 由 el98012 於 2020-10-30 15:39:28

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