2 sentences for 论 (lùn — discuss)

1. 论棋艺，他比哥哥稍逊一筹。

   lùn qí​yì, tā bǐ gē​ge shāo​xùn​yī​chóu.

   In terms of chess skills, he is slightly inferior to his brother.

   Source: Dong Chinese Dictionary

2. 我们今天不谈私事，只论公事。

   wǒ​men jīn​tiān bù tán sī​shì, zhǐ lùn gōng​shì.

   We are not talking about private matters today, only official business.

   Source: Dong Chinese Dictionary