来自《耶鲁大学开放课程：聆听音乐 第18集 第18集》

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  as this thing gets bigger
  并且当钢琴体积变大时
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  and we want to put more tension on these strings to really pound,
  我们也需要把琴弦上得更紧
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  so we don't break them or they don't come loose,
  在保证它们不会断的同时也不会松弛下来
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  we need some kind of iron support
  我们需要用一点铁来辅助支撑
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  So first they started putting pieces of iron
  开始的时候是放一个铁片
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  and then ultimately an entire frame, a bed of iron, cast iron,
  到最后底部的整个框架都是铁的 铸铁
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  underneath that thing for that soundboard to rest in
  然后他们将响板置于其中
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  Then we need the--at the other end we need a pin block
  而在另一头我们需要一个弦轴板
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  and that pin block has to be very secure
  它必须非常牢固
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  because that's where the pins
  因为琴弦就是靠这块弦轴板
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  that anchor the strings are going to be
  来固定的
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  Most of the problems--
  通常情况下