3 sentences

1. 数学是他的强项。

   shù​xué shì tā de qiáng​xiàng.

   Math is his strong suit.

   Source: Dong Chinese Dictionary

2. 唱歌是她的强项。

   chàng​gē shì tā de qiáng​xiàng.

   Singing is her strong point.

   Source: Tatoeba

3. 基本的人类情感不是我的强项。

   jī​běn de rén​lèi qíng​gǎn bù shì wǒ de qiáng​xiàng.

   Basic human emotions are not my strong suit.

   Source: OpenSubtitles