他们通过勤奋的练习和准备进行预演；他们保持严格的纪律和专业性。
They rehearse through diligent practice and preparation; they remain disciplined and professional.
无论学习那种语言，张开嘴巴勤奋练习是非常必要的。
No matter which language you are studying, you should open your mouth and practice extra hard.
努力工作，勤奋练习。只有这样，你的努力才能获得回报。
Work harder and practise more. Only in this way, will your efforts be rewarded.
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