Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
rank – n. a position in a society, organization, group, etc.
congestion – adj. too full or crowded with something, like vehicles
commuter - n. a person who travels regularly to and from a place and especially between where you live and where you work
urbanization – n. the process by which towns and cities are formed and become larger as more and more people begin living and working in central areas
location – n. a place or position
freight – n. goods that are carried by ships, trains, trucks, or airplanes
