Traditional: 於是
于是 (yú shì) means “thereupon; as a result; consequently; thus; hence”. It is an HSK 4 Chinese word (traditional 於是) in the HSK 3.0 vocabulary.
他生病了,于是没来上课。
Tā shēngbìng le, yúshì méi lái shàngkè.
He was sick, therefore didn't come to class.
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