In its simplest mode it ACTS as a thread-safe queue in which consumers are blocked while the queue is empty.

它最简单的使用模式便是作为一个线程安全的队列，并且在队列为空时阻塞消费者。

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For a list of functions and properties blocked in sandbox mode, see functions and properties that are blocked in sandbox mode.

有关在沙盒模式下被阻止的函数和属性的列表，请参阅沙盒模式中阻止的函数和属性。

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Most of the Spanning Tree Algorithm(STA) failures occur due to the excessive loss of BPDUs causing the blocked ports to transition to forwarding mode.

大多的生成树算法（STA）失败发生由于过多的丢失BPDU导致阻塞端口转换为转发模式。

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