机
不
可
失
，
时
不
再
来
j
ī
j
ī
b
ù
b
ù
k
ě
k
ě
s
h
ī
s
h
ī
,
,
s
h
í
s
h
í
b
ú
b
ù
z
à
i
z
à
i
l
á
i
l
á
i
Definitions
1. Opportunity knocks but once. (idiom)
Components
机不可失
jī bù kě shī
–
No time to lose! (idiom)
时不再来
shí bù zài lái
–
Time that has passed will never come back. (idiom)