sānyǎnghuà'èrdàn

== Mandarin == === Romanization === sānyǎnghuà'èrdàn (Zhuyin ㄙㄢ ㄧㄤˇ ㄏㄨㄚˋ ㄦˋ ㄉㄢˋ) Hanyu Pinyin reading of 三氧化二氮