业精在于勤练 practice makes perfect

多学勤练 Learn more diligent practice

勤练铁布衫 iron-cloth

勤练桌球 keyword research on

勤学苦练 Hard work and practice ; to train assiduously ; to study diligent

勤于练习 Be diligent in practice ; Diligent practice

勤务训练 service training

卫勤训练 medical service training

海上执勤训练 in training and on duty

训练空勤组的飞机 aircrew trainer