Chapter 4 mainly researches the relationship between "the Rule of Reference" and "the Pacta Tertiis Principle".

第四章主要研究“参考适用规则”和“非缔约国不受约束原则”的关系。

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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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To maintain the integrity of objects with different lifetimes, you must follow one rule when referencing objects: an object may not reference another object with a shorter lifetime.

要维护具有不同生存期的对象的完整性，在引用这些对象时必须遵守一条规则：一个对象可能不能引用另一个具有更短生存期(与自身比较)的对象。

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