Loudness and sharpness are of great importance to the sound quality of a motorcycle while roughness and fluctuation strength is of little importance.
研究表明响度和尖锐度是影响摩托车声音品质的主要因素，而粗糙度和波动度对声音品质的影响不大。
When producing gray iron, it is possible by adding trace antimony to prevent quality fluctuation of molten iron and increase tensile strength and wear resistance.
在生产灰铸铁时，加入微量锑可防止铁液质量波动，提高抗拉强度和耐磨性。
Such optical resonators distribute randomly in the random medium and their amount and distributing characteristics depend on the strength of the dielectric constant fluctuation.
这样的光腔在介质中是随机分布的，其数量与分布特征与介电常量涨落的强弱有关。
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