骤然 zhòurán HSK7 suddenly Origin Definitions Defs Strokes Stroke Words Sentences Sents 1 sentence 原本晴朗的天空骤然变暗，乌云密布。 yuánběn qínglǎng de tiānkōng zhòurán biàn àn, wūyún mìbù. The originally clear sky suddenly darkened and became covered with dark clouds. Source: Dong Chinese Dictionary