4 sentences

1. 他为人坦率，从不隐瞒。

   tā wéi​rén tǎn shuài, cóng bù yǐn​mán.

   He is a frank person and never hides anything.

   Source: Dong Chinese Dictionary

2. 我之前不知道他是巴基斯坦人。

   wǒ zhī​qián bù zhī​dào tā shì Bā jī sī tǎn rén.

   I didn't know he was a Pakistani.

   Source: OpenSubtitles

3. 只要没做亏心事，他的心里就会很坦。

   zhǐ​yào méi zuò kuī​xīn​shì, tā de xīn​li jiù huì hěn tǎn.

   As long as he hasn't done anything against his conscience, he feels at ease.

   Source: Dong Chinese Dictionary

4. 前面是一片开阔且平坦的草地，适合露营。

   qián​miàn shì yī piàn kāi​kuò qiě píng tǎn de cǎo​dì, shì​hé lù​yíng.

   Ahead is an open and flat meadow, suitable for camping.

   Source: Dong Chinese Dictionary