4 sentences

1. 为了确保安全，电梯需要定期检修。

   wèi​le què​bǎo ān​quán, diàn​tī xū​yào dìng​qī jiǎn​xiū.

   To ensure safety, the elevator needs regular maintenance.

   Source: Dong Chinese Dictionary

2. 为了保证冬季供电，国家电网进行了全面检修。

   wèi​le bǎo​zhèng dōng​jì gōng​diàn, guó​jiā diàn​wǎng jìn​xíng le quán​miàn jiǎn​xiū.

   To ensure the winter power supply, the State Grid underwent a comprehensive maintenance.

   Source: Dong Chinese Dictionary

3. 经过一番彻底的检修，机器现在正处于正常的运行状态。

   jīng​guò yī fān chè​dǐ de jiǎn​xiū, jī​qì xiàn​zài zhèng chǔ​yú zhèng​cháng de yùn​xíng zhuàng​tài.

   After a thorough overhaul, the machine is now in normal working condition.

   Source: Dong Chinese Dictionary

4. 物业在电梯门口启事，提醒业主下周三全楼会停水检修。

   wù​yè zài diàn​tī mén​kǒu qǐ​shì, tí​xǐng yè​zhǔ xià Zhōu​sān quán lóu huì tíng shuǐ jiǎn​xiū.

   The property management posted a notice by the elevator, reminding residents that the water would be shut off for maintenance throughout the building next Wednesday.

   Source: Dong Chinese Dictionary