In the early 8th century, Johann Christoph Denner, a German instrument maker, improved the chalumeau by adding a register key, enabling the instrument to produce higher notes.
8 世纪初，德国乐器制造商 Johann Christoph Denner 通过添加注册键改进了 chalumeau，使乐器能够发出更高的音符。
| 单词 | register key |
| 例句 |
原声例句
202321 In the early 8th century, Johann Christoph Denner, a German instrument maker, improved the chalumeau by adding a register key, enabling the instrument to produce higher notes. 8 世纪初，德国乐器制造商 Johann Christoph Denner 通过添加注册键改进了 chalumeau，使乐器能够发出更高的音符。 |
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