将概率格局变迁系统作为操作语义的模型，它的每个状态是一个格局，格局是由一个PKAT表达式和一个数据状态组成的序列对。

A model termed probabilistic configuration transition systems was proposed, which are composed of a pair of a PKAT expression and a data-state.

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在2007年，NASA的科学家联合俄罗斯科学家乘船考察了这条河的变迁(为时三周)，以及这种类型的生态系统可能如何被气候变化所影响。

In 2007, NASA scientists joined Russian scientists to travel down the river by boat for three weeks to study the transition and how these types of ecosystems may be affected by climate change.

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企业IT生态系统的价值变迁。

A value shift across the enterprise IT ecosystem.

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