機不可失，時不再來 jī bù kě shī ， shí bù zài lái

DEFINITIONS

  1. Opportunity knocks but once. (idiom)

CHARACTERS

機 jī machine; moment, chance
不 bù
HSK 1
no, not; un-; negative prefix
可 kě
HSK 2
may, can, -able; possibly
失 shī
HSK 4
lose; make mistake, neglect
時 shí time, season; era, age, period
不 bù
HSK 1
no, not; un-; negative prefix
再 zài
HSK 1
again, twice, re-
來 lái come, coming; return, returning