题目选项分析

In astronomy the term "red shift" denotes the extent to which light from a distant galaxy has been shifted toward the red, or long-wave, end of the light spectrum by the rapid motion of the galaxy away from the Earth.

In astronomy the term "red shift" denotes the extent of the shift of light from a distant galaxy toward the red, or long-wave, end of the light spectrum by the rapid motion of the galaxy away from the Earth.