tri·ox·ide /(ˌ)traɪˈɑkˌsaɪd/
三氧化物
tri·ox·ide /(ˈ)traɪˈɑkˌsaɪd/ 名詞
三氧化物
Tri·ox·ide n. Chem. An oxide containing three atoms of oxygen; as, sulphur trioxide, SO3; -- formerly called tritoxide.
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trioxide
n : an oxide containing three atoms of oxygen in the molecule