10. A series of mechanical improvementscontinuing well into the nineteenth century, including the introduction ofpedals to sustain tone or to soften it, the perfection of a metal frame andsteel wire of the finest quality，finally produced an instrument capable of myriad tonal effects fromthe most delicate harmonies to an almost orchestral fullness of sound，from a liquid，singing tone to a sharp, percussivebrilliance．

(介词结构from…to…作定语)

持续到19世纪的一系列机械上的改进，包括引入踏板以维持音调或使其柔和，改善金属框架，以及使用最佳牲能的钢丝，最终产生了一种具备无数音调效果的乐器——这些效果涵盖了从最精致的和声到几乎全部的管弦乐音响，从明快流畅的吟唱音调到尖锐的打击乐器的恢弘气氛。

分句1：A series of mechanical improvementscontinuing well into the nineteenth century

分句2：including the introduction ofpedals to sustain tone or to soften it

分句3：the perfection of a metal frame andsteel wire of the finest quality

分句4：finally produced an instrumentcapable of myriad tonal effects

分句5：from the most delicate harmonies toan almost orchestral fullness of sound，

分句6：from a liquid，singing tone to a sharp, percussivebrilliance

本句的真正的主句结构其实是由分句1和分句4构成，即A series of mechanicalimprovements continuing well into the nineteenth century finally produced aninstrument capable of myriad tonal effects，，分句2和分句3并列修饰说明分句1中的A series of mechanical improvements，而分句5和分句6并列，修饰说明了分句4中的an instrument capable of myriad tonal effects。