Definition
A phrase used to express that a past period of time was particularly good or enjoyable and is now fondly remembered.
思当年
We used to meet at that coffee shop on the corner all the time; those were the days.
我们以前总是在街角的那家咖啡店见面；那真是美好的时光。
In the era without the internet and smartphones, we used to write letters with real paper and pens; those were the days.
在没有网络和智能手机的时代，我们用真正的纸和笔写信；那真是美好的时光。
I remember running freely in the fields when we were kids; those were the days.
我还记得我们小时候在田野里自由奔跑的时光；那真是美好的时光。