As we know, learning is process of accumulating knowledge. It is one's life-long task, which cannot be accomplished in one move.

我们知道，学习是一个积累知识的过程，它是人一生的任务，不可能一气完成。

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Accumulating evidence indicates that, NR2B is crucial for synaptic plasticity, learning and memory and nervous system degenerative diseases.

大量实验数据证明，NR2B亚单位与哺乳动物的突触可塑性、学习记忆、痛觉和神经系统疾病有关。

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Another question is the issue of time - the time involved in living, learning, accumulating, acting, doing, and the ending of me as we know it;

另一个问题是关于时间的话题——时间包括生活，学习，积累，动作，活动，还有如我们所知的我的结束；

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