The requirements of this Recommendation are intended to ensure effective maintenance of international data transmission systems.

本建议的各项要求是为了保证有效地维护国际数据传输系统。

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Serious concerns that there is a lack of effective maintenance and administration of safety standards established at that time pursuant to the Chicago Convention;

对缺少有效保持和实施根据芝加哥公约届时所制定的安全标准产生严重关切；

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Assist engineering manager to manage facility, equipment and engineering, to provide technical support and effective maintenance, to be involved in engineering project.

协助工程部经理管理设施设备和工程，提供技术支持和有效的设备维修，并参与工程项目。

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Western allies, meanwhile, are being calmed by talk of strengthening Lebanon's army and central state, and by the effective maintenance of a neutral stance in regional diplomacy.

ECONOMIST: Resilient Lebanon

Highly effective, and completely maintenance free, it kept their pueblos warm in winter, and cool in the summer using only stone age technology.

FORBES: Gassing Up: Why America's Future Job Growth Lies In Traditional Energy Industries

Saab is apparently suspending all new car, powertrain, emissions and parts warranties, along with recall campaigns, certified pre-owned coverage and no-charge maintenance programs effective immediately.

FORBES: Saab Cancels All Warranty Coverage -- Updated