Read Edit View history 一旦 yīdàn HSK5 once Origin Definitions Defs Strokes Stroke Words Sentences Sents 一旦 yīdàn once adverb once (something happens); in case; if 一旦开始，就不能停下来。 yīdàn kāishǐ, jiù bùnéng tíng xiàlai. Once you start, you can't stop. short time idiom in a single day; in a very short time 他多年的心血毁于一旦。 tā duō nián de xīnxuè huǐ yú yīdàn. His years of hard work were ruined in an instant. Frequency Movie subtitles 87.1 per million appears in 31% of films Written text 81.9 per million Details HSK 2.0 Level 5 HSK 3.0 Level 5 Sources Definitions CC-CEDICT Frequency data SUBTLEX-CHBCC Corpus (BLCU)
一旦 yīdàn once adverb once (something happens); in case; if 一旦开始，就不能停下来。 yīdàn kāishǐ, jiù bùnéng tíng xiàlai. Once you start, you can't stop. short time idiom in a single day; in a very short time 他多年的心血毁于一旦。 tā duō nián de xīnxuè huǐ yú yīdàn. His years of hard work were ruined in an instant. Frequency Movie subtitles 87.1 per million appears in 31% of films Written text 81.9 per million Details HSK 2.0 Level 5 HSK 3.0 Level 5 Sources Definitions CC-CEDICT Frequency data SUBTLEX-CHBCC Corpus (BLCU)