This has led to user needs in the four systems to maintain four configuration data, respectively, for users to bring a great deal of inconvenience.

这导致用户需要在四个系统中分别维护四份配置数据，为用户使用带来了极大的不便。

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The results show that pollutants removal performance of the system constructed by the mixed packing medium with equal volume proportion of bricks and ceram waste is the best of the four systems.

结果表明，以等体积掺混废砖块和废陶获得的混合填料构建的人工湿地系统，在处理含高浓度和低浓度有机污染物的河水时均表现出良好的除污效果。

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It is already obvious that all four American systems have leapfrogged over the European versions.

显然，美国的全部4套系统已经超越了欧洲的版本。

《柯林斯英汉双解大词典》

The Race to the Top competition will look for states and local school systems with effective reforms in four areas.

VOA: special.2009.07.30

Cows need about two to four weeks to learn to use the robotic milking systems.

VOA: special.2009.05.12

The robotic systems are designed to operate twenty-four hours a day.

VOA: special.2009.05.12

The four systems run on Solaris 8 OS and extend the server line whose genesis in September was the Sun Fire 280R.

CNN: CeBIT: Sun puts new servers in spotlight

Ms Leggott added the hospital had four systems for booking operations so a full, accurate picture would be published by July.

BBC: Nottingham hospitals' plan for cancelled ops

All four of the new systems include full hardware redundancy, redundant storage and network connections and allow for live operating system upgrades, Sun said.

CNN: CeBIT: Sun puts new servers in spotlight