1·General relativity predicts that the wavelength of this light will be shifted by a small amount due to the galaxies' mass, in an effect called gravitational redshift.
广义相对论预言这种光的波长会因这些星系的质量而有少量的偏移，这种效应称为引力红移。
2·A decreased frequency is equivalent to a longer, or redder, wavelength. This is gravitational redshift.
较低了的频率，相当于较长或较红的波长，这就是红移。
3·And redshift depends on just how the universe is expanding.
并且红移取决于宇宙如何膨胀。
4·As light from the most distant explosions travels toward Earth, it is stretched by the universe's expansion so that it appears red, a phenomenon known as redshift.
最遥远的爆炸光飞向地球时，被宇宙的膨胀拉长而呈红色——一种被称作红移的现象。
5·On the histograms of their redshift, optical luminosity and average optical X-ray spectral index, it is found that X-ray selected quasars are distributed at the low ends of plots of these parameters.
发现在它们的红移、光学光度以及平均光学- X射线谱指数的直方分布图上，X射线选择类星体统计上都分布在这些参数图的低端。