Morderntime,humanhasmoreandmoreconvenientwaysto"deliver"yourselffromplaceAtoplaceB,especiallysincetheusefulairplanewasinventedbybrotherWright'sin1907.

　　Now,youcanchoosebus,longdistancebus,privatecar,ship,trainandairplanetostartyourtriptoanywhereallovertheworld.

　　airplaneisforsurefasterthananyofotherstransportways,butitisnotallpeople'sfavoriteorsayfirstchoice,somepeoplearealwaysafraidtheywouldbecrashedwhenthey"luckily"takethebrokenairplane.And,somepeoplecannottakeairplanebecauseoftheirsickness.Womenwhoarepregnantattheirearlymonthsorlatermonthsandveryoldpeoplealsohavenobigchancetotakeairplane,sotheyallhavetochooseanotherwaytogosomewhere,trainseemstobethebestchoiceamongthoserest.

　　Nowadays,trainsbecomemorecomfortablethanitusdto,weevenhavehardsleeperandsoftsleepers,aftertheDtrainstartedtorunfewyearsago,atripbytrainmakesmoresenseforus.