boom [bu:m]

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n.隆隆声；vt.发隆隆声

a deep and loud hollow sound

The country is having a great boom in industry. 这个国家的工业正蓬勃发展。
Boom? Boom? Boom? A series of explosions shook the valley. 轰？轰？轰？一连串爆破声震撼山谷。