23 sentences — page 2 of 2

21. 这个集合由五个元素组成。

    zhè​ge jí​hé yóu wǔ gè yuán​sù zǔ​chéng.

    This set consists of five elements.

    Source: Dong Chinese Dictionary

22. 他在数学课上学习了关于集合的知识。

    tā zài shù​xué kè shàng xué​xí le guān​yú jí​hé de zhī​shi.

    He learned about sets in his math class.

    Source: Dong Chinese Dictionary

23. 数学老师强调，真子集才是原集合真的子集。

    shù​xué lǎo​shī qiáng​diào, zhēn​zǐ​jí cái shì yuán jí​hé zhēn​de zǐ​jí.

    The math teacher emphasized that a proper subset is a true subset of the original set.

    Source: Dong Chinese Dictionary