2 sentences for 组合 (zǔ​hé — math combination)

1. 排列组合是数学课的重要内容。

   pái​liè zǔ​hé shì shù​xué kè de zhòng​yào nèi​róng.

   Permutations and combinations are an important part of math class.

   Source: Dong Chinese Dictionary

2. 我们这周要学习数学中的排列与组合。

   wǒ​men zhè zhōu yào xué​xí shù​xué zhōng de pái​liè yǔ zǔ​hé.

   We are going to learn permutations and combinations in mathematics this week.

   Source: Dong Chinese Dictionary