2 sentences for 单子 (dān​zǐ)

1. 在范畴论中，单子是一个非常重要的概念。

   zài fàn​chóu​lùn zhōng, dān​zǐ shì yī gè fēi​cháng zhòng​yào de gài​niàn.

   In category theory, a monad is a very important concept.

   Source: Dong Chinese Dictionary

2. 他是家里的单子，从小就备受父母的宠爱。

   tā shì jiā​lǐ de dān​zǐ, cóng xiǎo jiù bèi​shòu fù​mǔ de chǒng'ài.

   He is the only son in the family and has been doted on by his parents since childhood.

   Source: Dong Chinese Dictionary