事实上，从那以后，当天文学家无法找到更直接的测量星系距离的方法时，他们会以红移来代替。

In fact, ever since the discovery of this phenomenon, whenever astronomers cannot measure a galaxy's distance more directly they instead give an estimate using its redshift as a proxy.

youdao

事实上，从那以后，当天文学家无法找到更直接的测量星系距离的方法时，他们会以红移来代替。

In fact, ever since the discovery of this phenomenon, whenever astronomers cannot measure a galaxy's distance more directly they instead give an estimate using its redshift as a proxy.

youdao