cung1 jiu3 tiu4 gin2充要條件充要条件
Jyutpingcung1 jiu3 tiu4 gin2
Yalechūng yiu tìuh gín
Definition
necessary and sufficient condition
Tone guide
T1High level
T2High rising
T3Mid level
T4Low falling
T5Low rising
T6Low level
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