a US city where many people go to gamble. It is the largest city in the state of Nevada and one of the fastest growing cities in the US. It first became popular in the 1940s. Criminals once operated many of the hotels, nightclubs and casinos (= gambling clubs) on Las Vegas Boulevard, known as 'the Strip', but this has changed and the city now offers much more family entertainment. Las Vegas is also a place where many couples go to get married quickly. 拉斯韦加斯(美国城市,赌博业兴盛,内华达州最大城市,美国增长最快的城市之一)