It is a recent purchase of mine.

那是我前几天买。

She looked at the vendor who cheated her the other day with distaste.

恶地望着那个前几天曾经欺骗过小贩。

The idea emanated from a discussion we had the other day.

这个主意是在我们前几天一次讨论中想出。

She was a student revolutionary for a while but now she’s reverted to type. I saw her in a Mercedes the other day.

曾经是一位支持革命学生，但是现在又恢复原样了。几天前我看见坐在一辆梅德车里。