一氧化二氮 yī yǎng huà èr dàn

DEFINITIONS

  1. nitrous oxide N2O
  2. laughing gas

CHARACTERS

一 yī
HSK 1
one; a, an; alone
氧 yǎng
HSK 6
oxygen
化 huà
HSK 3
change, convert, reform; -ize
二 èr
HSK 1
two; twice
氮 dàn nitrogen