调和形式（harmonic form） 此部分主要是学会把 a*cosx+b*sinx化为 r*cos(x±y)或r*sin(x±y)的形式（即调和形式）。
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The instantaneous energy density does not oscillate with time at the harmonic form, its amplitude forms and envelope with Gaussian shape.
能流密度不再随时间作简谐振荡，它的振幅构成一个高斯形状的包络。
Most musician of Romantic genre would rather emphasize harmonic color and simplex impression than the logic or the form of classical music.
浪漫主义时期的作曲家喜爱单一的效果，强调和声的色彩性，逐渐远离了古典的音乐逻辑和宏大形式。
KIWA synthetic power saver with his unique structure form eliminates higher harmonic of the electrical network by way of the balance in adjusting three-phase current and voltage.
KIWA综合节电装置以其独特结构形式，通过调整三相电流和电压的平衡，消除电网高次谐波。
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