3 sentences

1. 他在大学里主修生化专业。

   tā zài dà​xué lǐ zhǔ​xiū shēng​huà zhuān​yè.

   He majored in biochemistry in college.

   Source: Dong Chinese Dictionary

2. 那是我的生化无人机原型机。

   nà shì wǒ de shēng​huà wú​rén jī yuán​xíng​jī.

   That was one of my prototype bio-drones.

   Source: OpenSubtitles

3. 这种酶能够催化细胞内的生化反应。

   zhè zhǒng méi néng​gòu cuī​huà xì​bāo nèi de shēng​huà fǎn​yìng.

   This enzyme can catalyze biochemical reactions within cells.

   Source: Dong Chinese Dictionary