Alongflightcanaffectone’sbiologicalblock,sometimesforda...
问题详情：Alongflightcanaffectone’sbiologicalblock,sometimesfordays.Airtravelerscangetverytiredanddevelopunpleasantfeelingswhentheyflygreatdistancesacrosstimezones.Thenaturalorderofthingscanbecomeunbal...