及物动词
不及物动词
名词
1. （经济的）繁荣，景气
If there is a boom in the economy, there is an increase in economic activity, for example in the amount of things that are being bought and sold.
2. （数量的）增长；（频率的）加快；成功
A boom in something is an increase in its amount, frequency, or success.
3. （经济或生意）景气，繁荣
If the economy or a business is booming, the amount of things being bought or sold is increasing.
4. （船帆的）下桁；帆桁
On a boat, the boom is the long pole which is attached to the bottom of the sail and to the mast and which you move when you want to alter the direction in which you are sailing.
5. 浮木挡栅，水栅（用来阻挡溢出的油扩散）
A boom is a large floating barrier that is used for stopping oil that has spilled from spreading.
6. （人)吼叫；（大炮或大鼓）发隆隆声
When something such as someone's voice, a cannon, or a big drum booms, it makes a loud, deep sound that lasts for several seconds.
7. - see baby boom
相关词组：boom out
1. any of various more-or-less horizontal spars or poles used to extend the foot of a sail or for handling cargo or in mooring
2. a pole carrying an overhead microphone projected over a film or tv set
Synonym: microphone boom
3. a deep prolonged loud noise
4. a sudden happening that brings good fortune (as a sudden opportunity to make money)
e.g. the demand for testing has created a boom for those unregulated laboratories where boxes of specimen jars are processed like an assembly line
Synonym: bonanzagold rushgravygodsendmanna from heavenwindfallbunce
5. a state of economic prosperity