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Repeat starting pianissimo and making a crescendo to forte and then a diminuendo.
重复长音练习,弱进渐强至强音然后渐弱.
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4、
Trombones sharply pronounce a D, followed by tuba and oboe in a sudden diminuendo.
长号尖锐地吹出一个D音, 之后是大号和双簧管的突然的渐弱演奏.
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