eruc·ta·tion /ɪˌrʌkˈteʃən, ˌi-/
  打嗝,噴出,噴出物
  Er·uc·ta·tion n.
  1. The act of belching wind from the stomach; a belch.
  2. A violent belching out or emitting, as of gaseous or other matter from the crater of a volcano, geyser, etc.
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  eructation
       n 1: (of volcanos) pouring out fumes or lava (or a deposit so
            formed) [syn: eruption, extravasation]
       2: a reflex that expels wind noisily from the stomach through
          the mouth [syn: belch, belching, burp, burping]