Power system Network Node thousands of mixed clouds, active power, reactive power flow, high harmonics, negative sequence current of the speed of light in the system-wide communication.

电力系统中网络结点千百个交织密布，有功潮流、无功潮流、高次谐波、负序电流等以光速在全系统范围传播。

youdao

The music is accompanied by a ghostly halo of harmonics, which is typical of the interplay between images of darkness and light that dramatises the whole cycle.

ECONOMIST: Classical music on CD

Messiaen adds slithery harmonics to end phrases, as if a silken thread of light carries the song that connects the earthborn boulders and birds to a celestial afterworld.

NPR: Messiaen At 100: A Song For The Solar System