| 单词 | sound-wave photography | 
| 释义 | sound-wave photography [¦sau̇nd ´wāv fǝ`tag·rǝ·fē]  PHYSICS A method of studying propagation, reflection, and refraction of sound waves, in which a sound wave is generated by a spark and is illuminated a fraction of a second later by a second spark, causing the wave to cast a shadow on a photographic plate.  | 
	
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