4 sentences

1. 算术让我疑惑不解。

   suàn​shù ràng wǒ yí​huò bù​jiě.

   Arithmetic puzzles me.

   Source: OpenSubtitles

2. 他们俩困惑不解地看着我。

   tā​men​liǎ kùn​huò​bù​jiě de kàn zhe wǒ.

   They both looked at me with confusion.

   Source: CCMatrix

3. 这个问题显然使他困惑不解。

   zhè​ge wèn​tí xiǎn​rán shǐ tā kùn​huò​bù​jiě.

   The question obviously confused him.

   Source: CCMatrix

4. 令我百思不解的是他们为什么没有出现。

   lìng wǒ bǎi​sī​bù​jiě de shì tā​men wèi​shén​me méi​yǒu chū​xiàn.

   What puzzles me is why they didn't show up.

   Source: UM-Corpus: Spoken