The competition's coming up. Kumiko is suddenly asked to play a difficult phrase from a different part. She begins practicing, but...
Please diligently practice the 
parts you need to work on.
أرجو أن تثابروا على ممارسة الأجزاء المطلوب إتقانها
Bitte übt eifrig die Parts,
die ihr noch verbessern müsst.
Ensayen a conciencia las 
partes que deben pulir.
Ensayad a conciencia las 
partes que debéis pulir.
Travaillez vos points faibles 
et ne relâchez pas vos efforts.
Esercitatevi con attenzione nelle parti
in cui dovete migliorare, per favore.
Por favor, esforcem-se bastante nas
partes em que tiverem dificuldade.