Based on the knowledge about the different slide diameter of the trombone playing the various styles of music pieces, the article clarified its important significant in performance and teaching.

文章通过深入地了解各种不同管径大小的长号在不同风格的音乐作品中的运用，阐明其在演奏与教学中的重要意义。

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This can be done using either valves as on the French horn, trumpet, and tuba or a slide, as on the trombone.

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