Establishing perfect ADSL broadband access maintenance and test management system and improving subscriber service quality have become urgent issues for carriers to popularize ADSL service.

建立完善的ADSL宽带接入维护测试与管理系统、提高用户服务质量已成为运营商在积极推广ADSL业务中迫切需要解决的问题。

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These mechanisms suffered from their proprietary nature, the performance issues associated with database access from a mediation, and the maintenance issues of working with a hand-crafted solution.

这些机制受到很多制约，即其专用性、与中介访问数据库相关的性能问题以及使用手动编码解决方案的维护问题。

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Maintaining a white finish over a length of time would present its own problems as a paint finish on such an exposed part of the house could require regular maintenance with difficult access.

况且，要它长时间的保持白色外观本身就会产生一些问题，因为在这块房屋外露的部分进行油漆粉刷是很难进行定期的维护保养的。

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Speaking on a motion aimed at widening access to Education Maintenance Allowance (EMA), Basil McCrea said one in five young people in Northern Ireland were unemployed.

BBC: Education maintenance allowance

Planting native shrubs in the pipeline pathways, which need to remain treeless to avoid root damage to pipes and to give maintenance crews access, would be better than just grass, the Nature Conservancy noted.

NPR: Northeast Drilling Boom Threatens Forest Wildlife

Planting native shrubs in clear-cut areas, which need to remain treeless to avoid root damage to underground pipes and to give maintenance crews access, would be better than just grass, the Nature Conservancy noted.

WSJ: Northeast drilling boom threatens forest wildlife