Prevention maintenance: a regular inspection, repair and replacement routine designed to reduce the risk of system failure.

预防式维修：一个定期检查，修理和例行更换的计划，以减少系统停顿的风险。

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In this article the authors analyze the contamination of hydraulic systems and the current maintenance methods. They give out the prevention maintenance method and the main ideas are presented.

分析了液压系统的污染及现有的维修方法，提出了主动预防性维护，并介绍了其主要内容。

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Article 24. Administrations in charge of the production and maintenance of motor vehicles and vessels should include prevention of their exhaust pollution in the respective sectional quality control.

第二十四条机动车船生产、维修管理部门应当将机动车船排气污染防治纳入行业质量管理。

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Biodiversity, which includes species, ecosystems, and ecological processes, is essential for the long-term maintenance of ecosystem services like photosynthesis, nutrient recycling, soil fertility, provision of fresh water, disaster prevention, and many others.

FORBES: Conservation International: Stemming the Tide of Environmental Crises, Part Five