3 sentences for 底层 (dǐ​céng — ground floor)

1. 这栋公寓的底层是商铺。

   zhè dòng gōng​yù de dǐ​céng shì shāng​pù.

   The ground floor of this apartment building consists of shops.

   Source: Dong Chinese Dictionary

2. 他把重要文件隐藏在抽屉的最底层。

   tā bǎ zhòng​yào wén​jiàn yǐn​cáng zài chōu​ti de zuì dǐ​céng.

   He hid the important documents at the very bottom of the drawer.

   Source: Dong Chinese Dictionary

3. 他把那叠秘密信件掩藏在书架的最底层。

   tā bǎ nà dié mì​mì xìn​jiàn yǎn​cáng zài shū​jià de zuì dǐ​céng.

   He hid the stack of secret letters at the bottom of the bookshelf.

   Source: Dong Chinese Dictionary