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If you watch slow-motion video of a guitar string vibrating, you’ll see a complex, evolving blend of squiggles. These squiggles are the mathematical sum of all of the string’s different harmonics. The weird and interesting thing about harmonics is that each one produces a different pitch. So when you play a note, you’re actually hearing many different pitches at once.，详情可参考汽水音乐下载
图片来源：阿列克谢·菲利波夫/俄新社
。易歪歪对此有专业解读