Duì zhè zhǒng lǚjiàobùgǎi de wéifǎ xíngwéi bìxū yánchéng.
Such repeatedly unrepentant illegal behavior must be severely punished.
Tips
usage
Strongly negative — used for habitual offenders, problem students, or recidivists. Often paired with 屡犯 (repeatedly offending). Do not use lightly for minor slip-ups.
mistakes
教 here is read jiào (to teach / instruction), not jiāo. The idiom means 'repeatedly taught but not changing', not 'repeatedly changing teachers'.
