2 sentences

1. 矩阵是线性代数中的核心概念。

   jǔ​zhèn shì xiàn​xìng dài​shù zhōng de hé​xīn gài​niàn.

   Matrices are a core concept in linear algebra.

   Source: Dong Chinese Dictionary

2. 线性代数是数学的一个重要分支。

   xiàn​xìng dài​shù shì shù​xué de yī gè zhòng​yào fēn​zhī.

   Linear algebra is an important branch of mathematics.

   Source: Dong Chinese Dictionary