ou3 sou3奧數奥数
Jyutpingou3 sou3
Yaleou sou
Definition
International Mathematical Olympiad (IMO) (abbr. for 國際奧林匹克數學競賽|国际奥林匹克数学竞赛[Guo2 ji4 Ao4 lin2 pi3 ke4 Shu4 xue2 Jing4 sai4])
Tone guide
T1High level
T2High rising
T3Mid level
T4Low falling
T5Low rising
T6Low level
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