1. The frontier town boomed when gold was discovered nearby. 当那个边疆城镇附近发现金矿时它迅速而蓬勃发展起来。
2. How long can the present business boom last? 目前这种商业繁荣能持续多久？
3. The aftermath of the war was not a boom, but a rural depression. 战争的结果不是繁荣和兴旺，而是农村经济的不景气。
英英解释
n.
1. a deep prolonged loud noise
2. a state of economic prosperity
3. a sudden happening that brings good fortune (as a sudden opportunity to make money)
4. a pole carrying an overhead microphone projected over a film or tv set
5. any of various more-or-less horizontal spars or poles used to extend the foot of a sail or for handl v.
1. make a resonant sound, like artillery
2. hit hard
3. be the case that thunder is being heard
4. make a deep hollow sound
5. grow stronger
