When an object is removed from the working memory, any conditional elements (of any rule) that had a reference to this object cannot be evaluated now.

当从工作内存中移除对象之后，引用该对象的（属于任何规则的）任何条件元素将不被求值。

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Setting it to true ensures that when a rule updates the knowledge in the working memory, you don't end up with rules being reevaluated and reexecuted, which could then cause an infinite recursion.

将它设为 true 可以确保当一个规则更新工作内存中的知识时，最终不会导致对规则重新求值并重新执行规则，也就不会导致无限循环。

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As a rule, Chris says he is wary of roofs over 60 feet high, and suggests that the costs of working at such heights would start to look as stupid as the paint itself.

柯里斯还说他很担心那些按照条例规定超过60英尺的屋顶，同时他还觉得建这么高的屋顶所花费的成本会变得像粉刷它们一样愚蠢。

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As long as we are a free people working under the rule of law with free enterprise, we will have a far cleaner environment and a far better quality of life a century from now than we enjoy today.

FORBES: Fact And Comment

But philanthropy is not a substitute for a working state under the rule of law.

FORBES: Causes and Effects

Conservation efforts have led to an increase in the manatee population, the commission said, and the U.S. Fish and Wildlife Service is working on a rule that would reclassify the manatee from endangered to threatened.

CNN: Algae bloom kills record number of manatees