a device in which a body of gas may be caused to emit sound waves when illuminated by a periodically interrupted beam of electromagnetic radiation…
| 单词 | θ76699 |
| 释义 | the world > matter > physics > science of sound > sound-waves > [noun] > emission of > device emitting (1) spectrophone1881 a device in which a body of gas may be caused to emit sound waves when illuminated by a periodically interrupted beam of electromagnetic radiation… |
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