A snapshot is a preservation of older blocks to maintain the state of a file system at a given instance in time.

快照就是旧块的保存以便及时维护给定实例中的文件系统状态。

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Heat preservation material is the exterior of exterior wall thermal insulation system core material, its main function is to thermal insulation.

外墙保温材料是建筑外墙外墙保温体系的核心材料，其主要功能是保温隔热。

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The application of Skin Effect Power Tracing System includes some designment about the load, such as the capacity of the system and the heat preservation of the pipeline.

最后是集肤效应电伴热系统的应用，涉及到负载相关的一些设计，如伴热系统容量及管道的保温等。

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In nineteen seventy-five, much of the Dolly Sods area became part of the National Wilderness Preservation System.

VOA: special.2009.07.20

He developed the "Pot-in-Pot Preservation/Cooling System."

VOA: special.2009.02.09

The Training Program included lessons, discussions, dialogues and interactive exercises of expert-trainers regarding the role and place of museum-reserves in the system of preservation and use of cultural and natural heritage of CIS countries.

UNESCO: OFFICE IN MOSCOW

There was the ultrasonic dishwasher, the atomic food preservation system and countless other wonders housed within its curvy shell.

FORBES: Ghosts Of Technologies Past

He also played a major role in keeping dams out of Dinosaur National Monument, the Yukon, and the Grand Canyon, and in establishing the National Wilderness Preservation System.

CNN: Environmentalist David Brower dead at 88