The securities return ratio is not random but biased random walk. The securities return ratio series is not independent but long-run correlations, and it has a long-run memory of 304 days.
证券收益率序列不是独立的，而是长期相关的，有一个时间为304天的长期记忆。
参考来源 - 我国证券市场有效性研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Students who can test themselves earlier will be better at retrieving the knowledge from the memory and keep it in the long run.
能够较早进行自我测试的学生更善于从记忆中检索知识，并将其长期保存。
For instance, one JVM might be faster to start up, while the other may maintain lower memory consumption over the long run.
比如说，一个JVM可以启动更快，但另一个可能长期内存占用较低。
But building a mental map without technology may improve memory in the long run.
但是从长远考虑，不借助科技构建大脑中地图可以增强记忆。
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