Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
subway - n. a train that operates mostly underground
tracks - n. a pair of metal bars that a train, trolley, or subway car rides along
suspect - n. a person believed by police to be involved with a crime
condolence - n. expressions of sympathy for the death of a relative or loved one
escalator - n. a moving set of stairs that carries people up or down from one level of a building or station to another
resort - n. a place where people go for vacations
