Maintain is a verb with multiple meanings:
1. To keep (something) in good condition by checking or repairing it regularly
2. To continue to have; to keep in existence, or not allow to become less
3. To state strongly that something is true
4. To provide someone with the things they need, such as money or food
5. In law, to keep a road, path, building, etc. in good condition
Maintain这个词儿可有意思了，咱们今儿个就好好唠唠：
1. 保养维护：比如"得定期给车做保养"就可以说"maintain the car regularly"
2. 保持维持：像"保持身材"就是"maintain a good figure"，"维持秩序"就是"maintain order"
3. 坚持主张：跟人掰扯的时候说"我坚持认为..."就是"I maintain that..."
4. 供养供给：比如"养家糊口"可以说"maintain a family"
5. 法律用语：指对道路、建筑等进行维护
生活小贴士：这个词儿在职场里特常见，比如"maintain good relationships with clients"就是"维护客户关系"，"maintain work-life balance"就是"保持工作生活平衡"，贼实用！