Space has served military operations at the strategic level, mainly for early-warning and long-range intelligence surveillance in airpower mission planning.

太空已经在预警和空中任务规划的长期情报监测等战略上服务军事。

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The over-the-horizon radar is mainly used for strategic early warning and long range tactical warning information radar systems.

超视距雷达主要用于战略预警及远程战术警戒情报雷达系统。

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Because both strategic crisis and abrupt disaster are forecasted very difficultly, so management crisis is the emphasis of crisis advance warning management.

由于战略危机和突发灾难都很难预测，因此，经营危机便是企业预警管理的重点。

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