少壮不努力，老大徒伤悲
shào zhuàng bù nǔ lì , lǎo dà tú shāng bēi
if you are lazy in your prime, you'll be sorry in your old age
少
shào
young
壮
zhuàng
to strengthen
不
bù
no; not so
努
nǔ
to exert
力
lì
power
，
,
老
lǎo
prefix used before the surname of a person or a numeral indicating the order of birth of the children in a family or to indicate affection or familiarity
大
dà
big; large; great
徒
tú
(bound form) disciple; apprentice; believer; (derog.) wrongdoer (as in 騙徒|骗徒[pian4 tu2] "swindler" or 叛徒[pan4 tu2] "traitor" etc)
伤
shāng
to injure
悲
bēi
sad