这种黑物质不发光，但它远远重于银河系数以亿计的恒星，使银河系的总质量达到太阳的一至二万亿倍。
While it emits no light, this dark matter far outweighs the Milky Way's hundreds of billions of stars, giving the galaxy a total mass one to two trillion times that of the sun.
指出了发光区有效电场强度、发光区的宽度及电压分配系数等都是与频率有关的物理量。
The results indicate that the effective electric field (e), the width of the emission region and the distribution rate in voltage are frequency dependent.
各种尺寸颜色形状可镶嵌在不同型号的道钉上，发光的强度系数根据反光珠的数量和向前的角度不同而各异。
These reflectors with different size and color can be used in various Road Stud, the reflective effect is various according to different number of beads and angle.
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