正常的遗忘甚至可能是一种安全机制，确保我们的大脑容量不会超负荷。
Normal forgetting may even be a safety mechanism to ensure our brain doesn't become too full.
当然，这是根据实际需要来调整栈大小的一般机制，如果栈的容量达到了最大值上限，那么栈就会溢出，程序也会收到一个段出错的信息。
This is the normal mechanism whereby stack size adjusts to demand. However, if the maximum stack size has been reached, we have a stack overflow and the program receives a Segmentation Fault.
后一个是分布式缓存器，当存储空间的容量用光的时候，就需要一种可扩展的机制来存储这些数据。
The latter is a distributed cache since this is where the bulk of storage space is used up, and a scalable mechanism is needed to store the data.
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