京滬高鐵:Beijing-Shanghai high-speed railway

　　實名制:real-name system

　　網上訂票系統:online ticket-booking system

　　打擊黃牛:foil/crack down on scalpers

　　試運行:trial operation

　　預檢:preliminary check

　　緩解交通:ease the transportation strain

　　大都市:metropolis