3 sentences for 纪念 (jì​niàn — souvenir)

1. 我买了一张明信片留作纪念。

   wǒ mǎi le yī zhāng míng​xìn​piàn liú​zuò jì​niàn.

   I bought a postcard as a souvenir.

   Source: Dong Chinese Dictionary

2. 请把这张照片留下做个纪念吧。

   qǐng bǎ zhè zhāng zhào​piàn liú​xià zuò gè jì​niàn ba.

   Please keep this photo as a souvenir.

   Source: Dong Chinese Dictionary

3. 这把老式木工刨是我爷爷留下的，非常有纪念意义。

   zhè bǎ lǎo​shì mù​gōng bào shì wǒ yé​ye liú​xià de, fēi​cháng yǒu jì​niàn yì​yì.

   This vintage woodworking plane was left by my grandfather and has great sentimental value.

   Source: Dong Chinese Dictionary