求翻译：“踏板旋律”是指管弦乐队同一乐器组内的某几个声部，各以一个长时值的单音为素材，按照一定的时值组合模式依次奏出，横向形成旋律，同时又于纵向构成和声的一种创作技法。是什么意思？

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" Melody" is a mound with a musical instrument in the orchestra a few channels, the other as a single voice in a long time-out value for materials, according to a certain combination of 657,000 , followed by resonant mode, horizontal shape melody Harmonies, while the vertical composition of a creati

“The footboard melody” is refers to in the orchestra identical musical instrument group some several musical parts, respectively take a long time value tone as the source material, plays in turn according to certain time value combination pattern, crosswise forms the melody, simultaneously in longit

"Treads melodies" refers to same musical group the Orchestra a few voices within, each a long tone for material according to value in certain patterns followed by plays, horizontal forms melodies, while harmony in vertical form a creative art techniques.

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