n. a deep prolonged loud noise
n. a state of economic prosperity
n. a sudden happening that brings good fortune (as a sudden opportunity to make money)
n. a pole carrying an overhead microphone projected over a film or tv set
n. 繁荣, 隆隆声
vi. 急速发展, 发隆隆声
vt. 使兴旺, 发隆隆声
1. The baby let out a loud boom when he hit the drum.
宝宝打鼓时发出了巨大的声音。
2. The economy experienced a boom after the new policies were introduced.
新政策推出后，经济经历了繁荣。
3. I heard a boom in the distance during the storm.
我在暴风雨中听到了远处的巨响。