Dictionary/一旦

一旦

yī dàn

ㄧ ㄉㄢˋ
NAdvHSK 5TOCFL L4core 10k
1in case (sth happens)
2if
3once (sth happens, then...)
4when
5in a short time
6in one day

Characters

一旦

Example

huài坏xí guàn习惯yī dàn一旦bèi被yǎng chéng养成，biàn便bù不néng能jiǎn dān简单dì地gǎi zhèng改正。
坏习惯一旦被养成，便不能简单地改正。
Once you have formed a bad habit, you can't get rid of it easily.