This is a very useful Chinese English dictionary which provides Chinese Traditional, Chinese Simplified, Pinyin, and English explanations.
| No. | Chinese Simplified | Chinese Traditional | Pinyin | explanation |
| 1 | 一旦 | 一旦 | yi1 dan4 | in case (sth happens)/if/once (sth happens, then...)/when/in a short time/in one day |
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