拳不离手， 曲不离口

拳不离手， 曲不离口 [quán bù lí shǒu qǔ bù lí kǒu]

1. ■ The boxer's fist must stick to its task, and the singer's mouth no rest must ask.; Boxing cannot dispense with the hand; nor song the mouth.; constantly study diligently and train hard to attain skilfulness [perfection]; engage oneself in constant practice so as to be in fighting trim when challenged or so as to be in good form when asked to sing; Practice makes perfect.