The third harmonic is the one you get from the string vibrating in thirds. Its frequency is three times the fundamental frequency. Since your C string’s fundamental is 1 Hz, the third harmonic has a frequency of 3 Hz, and it produces a note called G. The interval between C and G is called a perfect fifth, for reasons having nothing to do with harmonics. I know it’s confusing.
НАТО проведут учения рядом с российской границей02:50
，更多细节参见新收录的资料
Во время ракетного удара со стороны Вооруженных сил Украины (ВСУ) по Брянску люди не могли попасть в убежища, оборудованные в подвалах. Об этом пишет Daily Storm.
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that Emacs 31 keeps making things better in ways that matter
AMI Labs：一支全明星阵容的"世界模型"战队。PDF资料对此有专业解读