3 sentences

1. 苹果切开后很快就会氧化。

   píng​guǒ qiē kāi hòu hěn kuài jiù huì yǎng​huà.

   Apples oxidize quickly after being cut.

   Source: Dong Chinese Dictionary

2. 氧化还原反应是化学实验的基础。

   yǎng​huà huán​yuán fǎn​yìng shì huà​xué shí​yàn de jī​chǔ.

   Redox reactions are the foundation of chemical experiments.

   Source: Dong Chinese Dictionary

3. 这种化学物质对金属的氧化过程有明显的抑制作用。

   zhè zhǒng huà​xué wù​zhì duì jīn​shǔ de yǎng​huà guò​chéng yǒu míng​xiǎn de yì​zhì​zuò​yòng.

   This chemical substance has a significant inhibitory effect on the oxidation process of metals.

   Source: Dong Chinese Dictionary