4 sentences

1. 我们在天安门前合影留念。

   wǒ​men zài Tiān'ān​mén qián hé​yǐng liú​niàn.

   We took a commemorative group photo in front of Tiananmen Square.

   Source: Dong Chinese Dictionary

2. 毕业之际，同学们合影留念。

   bì​yè zhī​jì, tóng​xué men hé​yǐng liú​niàn.

   Upon graduation, the classmates took group photos for remembrance.

   Source: Dong Chinese Dictionary

3. 游客们争相在美景前拍照留念。

   yóu​kè men zhēng​xiāng zài měi​jǐng qián pāi​zhào liú​niàn.

   Tourists were vying to take photos in front of the beautiful scenery.

   Source: Dong Chinese Dictionary

4. 故地重游，他看着那些熟悉的老建筑，心中满是留念之情。

   gù​dì​chóng​yóu, tā kàn zhe nà​xiē shú​xī de lǎo jiàn​zhù, xīn​zhōng mǎn shì liú​niàn zhī qíng.

   Revisiting the old place and looking at those familiar old buildings, his heart was full of nostalgia.

   Source: Dong Chinese Dictionary