光线发射模型 Emission only
发射光线 radiate ; Emission of light ; Launch light
紫外线光电发射光谱学 uv photoemission spectroscopy
射线发射光谱 x ray emission spectrum ; xrayemissionspectrumx
激光射线发散 laser radiation divergence
射线光电发射衍射 x ray photoemission diffraction
光子发射曲线 photon emission curve
线发射光谱 SXE
光学发射线 optical emission line
远程定向声波发射器（Long Range Acoustic Device）发出的噪音像光线一样，进入指定人的耳朵中，然而它并不致命。
The noise from the LRAD is directed like a ray of light and travels only into the ears of that person, but it is not deadly.
球差-使以不同孔径角穿过透镜(或从镜面上发射)的光线不能聚焦在轴上的同一点。
Spherical Aberration — causes light rays passing through a lens (or reflected from a mirror) at different distances from the optical center to come to focus at different points on the axis.
暗物质既不发射也不吸收光线，因此即便是最强大的天文望远镜也无法直接探测到它。
It doesn't emit or reflect any light, so the most powerful telescopes have no hope of spying it directly.
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