6 sentences

1. 电线老化导致了短路。

   diàn​xiàn lǎo​huà dǎo​zhì le duǎn​lù.

   Aging wires caused a short circuit.

   Source: Dong Chinese Dictionary

2. 这种塑料在阳光下曝晒很容易老化。

   zhè zhǒng sù​liào zài yáng​guāng xià pù​shài hěn róng​yì lǎo​huà.

   This kind of plastic ages easily when exposed to sunlight.

   Source: Dong Chinese Dictionary

3. 由于琴弦老化，这架钢琴的音律有些失调。

   yóu​yú qín​xián lǎo​huà, zhè jià gāng​qín de yīn​lǜ yǒu​xiē shī​diào.

   Due to aging strings, the piano is a bit out of tune.

   Source: Dong Chinese Dictionary

4. 由于铁轨老化，一列货运火车发生了出轨。

   yóu​yú tiě​guǐ lǎo​huà, yī liè huò​yùn huǒ​chē fā​shēng le chū​guǐ.

   A freight train derailed due to aging tracks.

   Source: Dong Chinese Dictionary

5. 技术员正在更换那个已经老化了的转换器。

   jì​shù​yuán zhèng​zài gēng​huàn nà gè yǐ​jīng lǎo​huà le de zhuǎn​huàn​qì.

   The technician is replacing that aging converter.

   Source: Dong Chinese Dictionary

6. 如果不持续学习，掌握的知识很快就会老化。

   rú​guǒ bù chí​xù xué​xí, zhǎng​wò de zhī​shi hěn kuài jiù huì lǎo​huà.

   If you don't keep learning, your knowledge will soon become outdated.

   Source: Dong Chinese Dictionary