zhǔ shú de yā zi fēi le
the cooked duck flew away (proverb)
(fig.) to let a sure thing slip through one's fingers
煮
zhǔ
to cook
熟
shú
ripe; mature
的
de
of; ~'s (possessive particle)
鸭
yā
duck (CL:隻|只[zhi1])
子
zi
noun suffix, as in 椅子[yi3 zi5] "chair"
飞
fēi
to fly
了
le
(completed action marker)