Astudyofmorethanfivemillionbooks,bothfictionandnon-fict...
問題詳情：Astudyofmorethanfivemillionbooks,bothfictionandnon-fiction,hasfoundamarkeddeclineintheuseofemotionalwordsovertime.TheresearchersformtheUniversityofBristolusedGoogleNgramViewer,afacilityforfind...