如何在尽可能短的时间内找到灾民的确定位置，对于挽救灾民的生命和节省救助的人力物力有着十分重要的意义。

How to find the location of the siege people in a short time is essential to saving the people in help and saving up the precious time.

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华北克拉通区是世界大陆克拉通地壳的组成部分，与世界各大陆克拉通演化有很好的可对比性，在前寒武纪超级大陆重建中有一定位置。

The early crustal evolution of North China craton can be well correlated with other continents, and its tectonic position within the Precambrian Supercontinet should be reconstructed.

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锁定操作将数据暂时锁定在其当前内存位置中，从而阻止公共语言运行时的垃圾回收器将其重定位。

Pinning temporarily locks the data in its current memory location, thus keeping it from being relocated by the common language runtime's garbage collector.

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