The second part is a brief comment on harmonic limit standards.
第二部分简要评介谐波限制标准。
Setting speed-limit standards is a complex technical subject, because of many speed factors.
影响速度的因素有很多，因此制定限速标准是一项复杂的技术工作。
Adopt international science-based standards to limit human exposure.
采纳有科学依据的国际标准以限制人类暴露。
Adopt international science-based standards to limit human exposure.
采纳有科学依据的国际标准以限制人类暴露。
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