1. a reflex that expels gas noisily from the stomach through the mouth

1. expel gas from the stomach;

   "In China it is polite to burp at the table"
   

2. become active and spew forth lava and rocks;

   "Vesuvius erupts once in a while"
   

1.打嗝
If someonebelches, they make a sudden noise in their throat because air has risen up from their stomach.

e.g. Garland covered his mouth with his hand and belched discreetly.
加兰用手掩住嘴巴，小心地打了一个嗝。

2.喷出，冒出（烟、火等）；（烟、火等）喷出，冒出
If a machine or chimneybelches something such as smoke or fire or if smoke or firebelches from it, large amounts of smoke or fire come from it.

e.g. Tired old trucks were struggling up the road below us, belching black smoke...
破旧的卡车冒着黑烟艰难地沿着我们下方的公路往上爬。
e.g. Suddenly, clouds of steam started tobelch from the engine.
突然，滚滚蒸汽从发动机里冒了出来。

相关词组：belch out

1.

1. 打嗝：) 日常生活中我们免不了会打嗝(belch)、打哈欠(hiccup)、打喷嚏(sneeze)以及清嗓子(clear your throat),这些行为在中国人眼里是自然现象,所以我们的处理方式就是沉默不语.

2. belch

2. (响嗝)：/beg (乞求) | /belch (响嗝) | /bite (啃咬)

3. belch

3. 一阵阵冒出：belaying 挽缆的 |belch 一阵阵冒出 | Belfast 贝尔法斯特

4. 嗳气：Ehlers-Danlos综合征, Ehlers-Danlos syndrome | 嗳气,belch | 凹陷性病变, excavated lesion, depressed lesion