boom

• 名词，指突然发出的响亮低沉的声音，也指经济快速增长、扩张或繁荣的时期。

A noun referring to a sudden, loud, deep sound, or a period of rapid economic growth, expansion, or prosperity.

1. B2formal

   A period of rapid economic growth, increased activity, or prosperity.

   经济繁荣

   • The country experienced a tech boom in the 1990s.
   • The housing boom led to rising property prices.
   • The oil boom transformed the local economy.

   同义词expansionflourishinggrowthprosperitysurgeupsurgeupturn

   反义词bustcrashdepressionrecessionslump

2. Loud soundA2informal

   A deep, loud, resonant sound, often from an explosion or impact.

   轰隆声

   • We heard a loud boom from the construction site.
   • The boom of the fireworks echoed through the valley.
   • A sonic boom shook the windows.

   同义词bangblastclapcrashdetonationreportreverberationroarrumblethunder

3. Long poleB1formal

   A long, movable arm used on a ship, crane, or microphone.

   吊臂

   • The microphone boom was adjusted to capture the actor's voice.
   • The crane's boom lifted the heavy steel beam.
   • The sailboat's boom swung across the deck.

   同义词armjibpolespar

• 动词，用于表示突然、响亮而低沉的声音（如爆炸声），也用于描述经济或事业的迅速增长和繁荣。

A verb used to indicate a sudden, loud, deep sound, or to experience a period of rapid growth or expansion.

1. Make a loud soundB1formal

   To make a deep, resonant, and loud sound, like an explosion or thunder.

   发出隆隆声

   • The thunder boomed across the valley.
   • The cannon boomed during the celebration.
   • His voice boomed through the empty hall.

   同义词resoundreverberateroarrumblethunder

   反义词flutterhushmurmurmutterpeeppingrustlesoughtinklewhisper

2. Experience rapid growthB2formal

   To experience a sudden and significant increase in activity, value, or popularity.

   迅猛增长

   • The tech industry boomed in the 1990s.
   • The economy boomed after the new policies were introduced.
   • Real estate prices boomed in the city center.

   同义词blossomburgeonexpandflourishmushroomprosperrocketsoarsurgethrive

   反义词contractdeclinefalterslumpstagnate

短语动词变体boom out