Light emitted from farther away, and thus older, quasars lacked this wavelength, because the light was getting absorbed by neutral helium as well as helium with a single ion-or charged particle.
光线的发射处越远，年龄越大，类星体的光谱会缺失，因为某些波长的光线会被中性氦及氦离子或带电粒子吸收。
Rapid increase of aerosol optical depth and coarse particle concentration, as well as aerosol neutral or anomalous extinction was observed during dusty periods.
沙尘期间，气溶胶光学厚度显著升高，而尺度上升，粗粒子浓度显著增加，大气气溶胶表现出中性或异常消光特征。
The electron free flying time is determined by the electron -neutral particle collision frequency.
电子的自由飞行步长由电子与中性粒子的碰撞频率来决定。
Moreover, the average collision cross-section between a slow electron and a neutral particle is measured at several different temperatures using both the interferometer and the transmission methods.
本文将条纹干涉仪与透射仪联合使用，测定了在某些温度下慢电子与中性粒子的平均碰撞截面。
The average electron density in linear attenuation zone is about 10 ~ (-5) of neutral particle density, and can overcast wider area.
平缓衰减区中的平均电子密度约为中性分子密度的十万分之一，并且可以覆盖较大范围。
This investigation of the mechanism of premixing alum-rosin size for neutral-alkaline papermaking process focused on the mixture solution charge and particle size distribution.
中碱性造纸过程中松香明矾预混和过程的研究主要集中在混和液的电荷及粒度分布。
The hydrogen energy spectra during ICRF heating were measured with neutral particle analyzer in the HT-6M Tokamak lon temperature increase are observed.
介绍了用电荷交换分析器测量了HT-6M托卡马克离子回旋共振频率加热时的氢离子能谱，观察到离子温度的增加。
The hydrogen energy spectra during ICRF heating were measured with neutral particle analyzer in the HT-6M Tokamak lon temperature increase are observed.
介绍了用电荷交换分析器测量了HT-6M托卡马克离子回旋共振频率加热时的氢离子能谱，观察到离子温度的增加。
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