2 sentences

1. 这种新型复合材料使用树脂作为基质。

   zhè zhǒng xīn​xíng fù​hé cái​liào shǐ​yòng shù​zhī zuò​wéi jī​zhì.

   This new type of composite material uses resin as the matrix.

   Source: Dong Chinese Dictionary

2. 叶绿体基质是进行光合作用暗反应的场所。

   yè​lǜ​tǐ jī​zhì shì jìn​xíng guāng​hé zuò​yòng àn fǎn​yìng de chǎng​suǒ.

   The chloroplast stroma is the site where the dark reactions of photosynthesis occur.

   Source: Dong Chinese Dictionary