The cause, harm and effect of harmonic wave were introduced.
介绍了谐波的产生原因、危害及影响。
There is cause and effect relationship between the infringing act and the consequence of harm.
侵害行为与损害后果之间具有因果关系。
There is cause and effect relationship between the infringing act and the consequence of harm.
侵害行为与损害后果之间具有因果关系。
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