A short musical passage two to four measures long .
两个或四个小节长的短的音乐片断。
A musical passage moving from one key to another .
由一个调转到另一个调的音乐段落。
A short musical passage that seems to have been made spontaneously without advance preparation .
没有提前准备的即兴弹奏的短的音乐段落。
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