n.[C]

1. （雷，大炮等的）隆隆声；（波浪的）澎湃声；（蜂等的）嗡嗡声
2. （商业等的）景气，繁荣；（政治形势等的）突然好转
   The city is having a building boom.

   这个城市正在大兴土木。

3. 激增，暴涨

vi.

1. 发出隆隆声（或嗡嗡声等）
   The big guns boomed in the distance.

   远处大炮声隆隆作响。

2. 声音隆隆而过
3. 激增，暴涨；迅速发展，兴旺
   The county boomed when gold was discovered there.

   那个县在发现了黄金后便繁荣起来。

   Business boomed after the depression.

   萧条之后生意兴隆起来。

4. 名声大噪

vt.

1. 用隆隆声表达[（+out）]
   The foghorn boomed out its warning.

   雾角鸣声示警。

2. 使迅速发展；使兴旺；使出名
   Foreign investments boomed the city.

   国外投资使这个城市迅速繁荣起来。

3. 为……大力鼓吹

n.[C]

1. 吊杆；帆的下桁，帆杠
2. 栅栏，（河中防止木头向下游流去或船上行的）栏木或横江铁索，横江铁索，河中标柱
3. （起重机的）臂；（相机等的）支臂
4. 【空】（飞机的）尾桁

n.

v.

n.

v.

n.

1. a pivoted spar to which the foot of a vessel's sail is attached.
2. a movable arm carrying a microphone or film camera.
3. a floating beam used to contain oil spills or to form a barrier across a harbour mouth.