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- 問題詳情：Whydowecry?Themainreason,sayscientists,isbecausewearehuman.Asfarastheycantell,noothercreaturecriesemotionaltearsthewaywehumansdo,despiteanumberofreportsofanelephantorgorillanotjustmakingsadsoundsbutactuallyflowingtears.Interestedbyonesuchrepo...
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