反射信号来自于少量杂质。
超声波碰到杂质或分界面会产生显著反射形成反射成回波，碰到活动物体能产生多普勒效应。
Ultrasonic encounter impurities or boundary surface will produce significant reflection form reflex into echo, encounter moving objects can produce doppler effect.
这种球体对入射光存在折射、衍射、反射、吸收和杂质对入射光波的衰减作用等影响。
The sphere affects the incident by the refraction, diffraction, reflection, absorption and attenuation of impurity.
由于皮棉中白色或无色的杂质与皮棉反射特性相似，现有的光谱反射成像检测方法具有一定的局限性。
Present methods using spectral reflected imaging for detection of lint trash suffer from some fundamental limitation because the trash almost has the same reflected characteristic as the lint.
对A扫描脉冲反射法应用于检测药料中杂质进行了探索研究，试验结果证实用超声法检测药料中的非金属杂质具有一定可行性。
A-scanning impulse reflection method is applied to detect the nonmetallic. The result approves that using ultrasonic to detect nonmetallic is feasible.
还详细考虑了堆芯燃料球和石墨球以及反射层石墨中杂质对反应性的影响。
The effects of impurities in the fuel and the graphite element in the core and those in the reflector graphite on the reactivity of the reactor were considered in detail.
还详细考虑了堆芯燃料球和石墨球以及反射层石墨中杂质对反应性的影响。
The effects of impurities in the fuel and the graphite element in the core and those in the reflector graphite on the reactivity of the reactor were considered in detail.
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