2 sentences for 系统 (xì​tǒng — systematic)

1. 他系统地阐述了自己的观点。

   tā xì​tǒng de chǎn​shù le zì​jǐ de guān​diǎn.

   He systematically explained his views.

   Source: Dong Chinese Dictionary

2. 同学们在大学期间系统地学习了毛泽东思想。

   tóng​xué men zài dà​xué qī​jiān xì​tǒng de xué​xí le Máo Zé​dōng Sī​xiǎng.

   The students systematically studied Mao Zedong Thought during their university years.

   Source: Dong Chinese Dictionary