You’resittingonthetrainhomeandthepersonoppositeyouyawns...
问题详情：You’resittingonthetrainhomeandthepersonoppositeyouyawns(打哈欠).Suddenly,you’reyawningwithhim,thoughyou’renottired.Thisphenomenonconfusedscientistsforyearsuntilarecentstudyfoundthatpeoplete...