在旅行结束时，我们拍了一张照片留念。

Zài lǚxíng jiéshù shí, wǒmen pāi le yī zhāng zhàopiàn liúniàn.

At the end of the trip, we took a photo as a keepsake.

这是我在那个城市的最后一天，特地买了礼物留念。

Zhè shì wǒ zài nàge chéngshì de zuìhòu yītiān, tèdì mǎi le lǐwù liúniàn.

This is my last day in that city, so I bought a gift as a memento.

我们在婚礼上留念了一张全家福。

Wǒmen zài hūnlǐ shàng liúniàn le yī zhāng quánjiāfú.

We took a family photo as a keepsake at the wedding.