I'll arbitrarily divide them into four areas: failures, network issues not within the direct control of service provider, denial of service, and scheduled maintenance.

我将随意将它们分为四类：故障、不受服务提供者直接控制的网络问题、拒绝服务和预订的维护。

youdao

Direct database access using JDBC from client to server is discouraged as this creates a tight coupling that greatly complicates application maintenance.

不赞成使用JDBC从客户机对服务器进行直接数据库访问，因为这样将创建紧耦合，使应用程序的维护变得非常复杂。

youdao

It's one of the few schemes here to have direct access to the sea and it's one of the few to have professional facilities management to look after the pools, maintenance and landscaping.

里金斯解释道：“这是为数不多的直接通向大海的项目之一，也是为数不多的具备专业设施管理技能、管理游泳池、维修和景观的公司之一。”

youdao

That bill, which is opposed by the Republican majority in the Senate who favor a less comprehensive measure, would allow medical patients to sue their health maintenance organization or insurance company in the event a coverage decision caused direct, documentable harm.

CNN: Bush, Gore stalk stage and each other in final debate