si2 mou4 cin4 lai6史无前例
Jyutpingsi2 mou4 cin4 lai6
Yalesí mòuh chình laih

Definition

(idiom) unprecedented in history

Tone guide

T1High level
T2High rising
T3Mid level
T4Low falling
T5Low rising
T6Low level

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Dictionary data from CC-Canto and CC-CEDICT, licensed under CC BY-SA 3.0.