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关于长号的口形问题和号咀在嘴上的放置位置的谈论很多。然而,绝大多数的长号吹奏法既不强调形成吹奏力量的面部肌肉的正确位置,也不对在不同程度的铜管演奏者中普遍存在的嘴唇过分紧张或过分松弛的现象给予警告。
Talk about the trombone’s mouth shape and number Tsui mouth placement. However, most trombone techniques neither emphasize the correct position of the facial muscles that form the playing force, nor do they warn of the over-tensioned or over-relaxed lips that are prevalent among brass players of varying degrees.