a star system millions of light years away远在数百万光年以外的星系

3,000 light years away3,000光年以外

I had not eaten anything hot since my last dinner with Sean. It seemed light years away.自上次和肖恩一起以后, 我再也没吃过热乎东西。那次进餐好像是很遥远的事了。

She says the French education system is light years ahead of the English one.她说法国的教育体制遥遥领先于英国。