wavelength - the distance between one crest or trough to the next, amplitude - the height of the wave, crest or peak - the high point of the wave, trough - the low point of the wave, resting point - halfway between a crest and a trough, frequency - the number of wavelengths that pass a point within a specific unit of time,

排行榜

視覺風格

選項

切換範本

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