2 sentences

1. 纪念馆内的气氛庄严肃穆。

   jì​niàn​guǎn nèi de qì​fēn zhuāng​yán sù mù.

   The atmosphere inside the memorial hall was solemn and respectful.

   Source: Dong Chinese Dictionary

2. 这座纪念馆是为了纪念那位民族英雄而建的。

   zhè zuò jì​niàn​guǎn shì wèi le jì​niàn nà wèi mín​zú yīng​xióng ér jiàn de.

   This memorial hall was built in memory of that national hero.

   Source: Dong Chinese Dictionary