This sort of prerequisite constraint is important to ensure that each Action maps to only one Task.

这种类型的先决条件约束对于确保每个 Action 仅映射到一个 Task 非常重要。

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Each rule is an action parameter of one of the constraint child elements.

每个规则是constraint子元素之一的action参数。

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The income gap between citizens in different regions are the result of compound action of many constraint factors such as nature, society, policy, regulation, market and management.

不同地区居民收入差距扩大是自然、社会、政策、制度、市场及管理等多种约束因素综合作用的结果。

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