a few years back

a few years back a few years back 和a few years ago啥区别大神们帮帮忙 {3} let my heart back to a few years ago felt so helpless. 英语翻译We all know that in a few years,Humanity will look back a few years back when l was about ten.my grandfather was on I thought back a few years to the occasion,---the issue had a few hundred years ago He will come back in a few pound back a few 什么意思? every few years 中,few前为什么不加“a”? A few years later 用什么时态? a few years down the road