3 sentences

1. 光合作用是植物能量的来源。

   guāng​hé zuò​yòng shì zhí​wù néng​liàng de lái​yuán.

   Photosynthesis is the source of energy for plants.

   Source: Dong Chinese Dictionary

2. 植物通过光合作用吸收二氧化碳。

   zhí​wù tōng​guò guāng​hé zuò​yòng xī​shōu èr​yǎng​huà​tàn.

   Plants absorb carbon dioxide through photosynthesis.

   Source: Dong Chinese Dictionary

3. 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