Represents the set of execution contexts, created by the current activity, that have been completed and were persisted upon their completion.
表示由当前活动创建的、已经完成并且完成后已保留的执行上下文集。
The third issue that Stephen discusses is the concept of contexts, specifically the synchronization context and the execution context.
Stephen所讨论的第三个问题是上下文的概念，特别是同步上下文（synchronizationcontext）和执行上下文（execution context）。
The third issue that Stephen discusses is the concept of contexts, specifically the synchronization context and the execution context.
Stephen所讨论的第三个问题是上下文的概念，特别是同步上下文（synchronizationcontext）和执行上下文（execution context）。
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