Theworlditselfisbecomingmuchsmallerbyusingmoderntraf...
問題詳情: Theworlditselfisbecomingmuchsmallerbyusingmoderntrafficandmoderncommunicationmeans.Lifetodayismucheasierthanitwashundredsofyearsago,butithasbroughtnewproblems.Oneofthebiggestproblemsispo...