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本文是一篇關(guān)于記憶和遺忘方面的心理學(xué)的文章。

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Practice (or review) tends to build and maintain memory for a task or for any learned material. Over a period of no practice what has been learned tends to be forgotten; and the adaptive consequences may not seem obvious. Yet, dramatic instances of sudden forgetting can be seen to be adaptive. In this sense, the ability to forget can be interpreted to have survived through a process of natural selection in animals. Indeed, when one's memory of an emotionally painful experience leads to serious anxiety, forgetting may produce relief. Nevertheless, an evolutionary interpretation might make it difficult to understand how the commonly gradual process of forgetting survived natural selection.
練習(xí)（或者復(fù)習(xí)）有助于建立和保持對(duì)一項(xiàng)任務(wù)或任何學(xué)習(xí)過的材料的記憶。如果一段時(shí)間不練習(xí)，已學(xué)習(xí)到的知識(shí)往往會(huì)被遺忘；其適應(yīng)性結(jié)果可能表現(xiàn)得不明顯。但是戲劇性的突然遺忘的例子可以被看作為極具適應(yīng)性。從這點(diǎn)看，遺忘的能力可以被理解為動(dòng)物通過自然選擇進(jìn)程贏得了生存。的確，當(dāng)一個(gè)人對(duì)一件情感上很痛苦的經(jīng)歷的記憶導(dǎo)致了嚴(yán)重的焦慮時(shí)，遺忘可以帶來脫。然而，進(jìn)化論的解釋可能會(huì)使人很難理解一般地漸進(jìn)遺忘過程是如何經(jīng)自然選擇生下來的。