3 sentences

1. 我们进入了主楼。

   wǒ​men jìn​rù le zhǔ​lóu.

   We entered the main building.

   Source: CCMatrix

2. 我们在主楼的酒店房间住了两晚。

   wǒ​men zài zhǔ​lóu de jiǔ​diàn fáng​jiān zhù le liǎng wǎn.

   We stayed two nights in a hotel room in the main building.

   Source: CCMatrix

3. 博物馆主楼后面有一个小湖和餐馆。

   bó​wù​guǎn zhǔ​lóu hòu​miàn yǒu yī​ge xiǎo hú hé cān​guǎn.

   There is a small lake and restaurant behind the main building of the museum.

   Source: CCMatrix