定音鼓有著悠久的历史。

The timpani have had a long history.

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定音鼓变成标准的尺寸，相对的变得更复杂了。

They became a standard size, but more complex. The new timpani have added special pedals.

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而在那时，乐器制造者开始改造定音鼓，把定音鼓的体积和声音都变得更大。

At that time, instrument makers were creating timpani, which were bigger in size and sound.

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而在那时，乐器制造者开始改造定音鼓，把定音鼓的体积和声音都变得更大。

At that time, instrument makers were creating timpani, which were bigger in size and sound.

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