Someone does indeed need to maintain them, and that has generally meant keeping legacy equipment and programs in a back room somewhere to handle occasional emergencies.

有人确实需要维护这些系统，而这通常意味着必须把一些老设备和程序收藏起来以备不时之需。

youdao

With onClose handling, keep-alives, message queues, timeouts and retries, we finally will have a chat room that can maintain a users presence while they remain on the web page.

通过onClose处理、连接保持、消息队列、超时和重试，我们最终实现了一个可以在用户停留在网页上的时候保持其存在状态的聊天室。

youdao

Management is expected to buy back more stock and has ample room to maintain--or even raise--its dividend (currently yielding 2%).

FORBES: Out-Sourcerers

This will explicitly state that teachers can physically remove disruptive pupils from class or prevent them from leaving the room to maintain discipline.

BBC: Head teachers' search power to be toughened

Israeli officials maintain that there is room for compromise.

ECONOMIST: A Middle Eastern time-out?