Whydowecry?Themainreason,sayscientists,isbecausewearehu...
问题详情：Whydowecry?Themainreason,sayscientists,isbecausewearehuman.Asfarastheycantell,noothercreaturecriesemotionaltearsthewaywehumansdo,despiteanumberofreportsofanelephantorgorillanotjustmakingsadsou...