通过选择合适的等待乐曲，该公司电话挂断率下降了50%。
By choosing appropriate waiting music, the abandon rate of this company has reduced by 50%.
选择听音乐的那一组有六盘磁带可供选择，都是节奏在每分钟60-80拍的舒缓音乐，如爵士乐、民歌或管弦乐曲等。
The music group were able to choose from six tapes that featured soft, slow music - around 60-80 beats per minute - such as jazz, folk or orchestral pieces.
通常所说的即兴演奏，实际上是“经过练习的即兴演奏”，即你对乐曲的几种可资选择的变化预先进行练习，而这些变化是遵循一定的规律作出的。
What is generally referred to as improvisation is "practiced improvisation" in which you have practiced a set of optional changes to pick from, and these changes usually follow a set of rules.
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