The feature is an essential element that comprises spatiotemporal data information and the event is a fundamental factor that result in changing spatiotemporal data.
地理特征对象是时空数据组织的基本单元，而事件是导致时空数据发生变化的根本原因。
The demand for new knowledge and skills will be constant, no longer a value added element, but the essential factor in determining organizational survival.
对新知识和新技术的需求将成为一种常态，而不再是一种增值的因子，这种需求将成为组织生存不可或缺的要素。
The demand for new knowledge and skills be constant, no longer a value added element, but the essential factor in determining organizational survival.
对新知识和新技术的需求将成为一种常态，而不再是一种增值的因子，这种需求将成为组织生存不可或缺的要素。
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