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HSK 3.0
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一旦
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一旦
yīdàn
noun
adverb
HSK 5
Meaning
in case (sth happens)
if
once (sth happens, then...)
when
in a short time
Characters
一
旦
More HSK 5 words
打
一下儿
封
刻
牛
怪
落
散
应
安慰