things like arithmetic (算术) or historical facts, but also involves any change in the way an animal typically behaves. Memory is involved when a rat gives up eating grain because he has sniffed something suspicious in the grain pile.
Memory exists not only in humans and animals but also in some physical objects and machines. Computers, for example, contain devices for storing data for later use. It is interesting to compare the memory storage capacity (容量) of a computer with that of a human being. The instant access memory of a large computer may hold up to 100,000 “words”—strings of alphabetic or numerical characters—ready for instant use. An average US teenager probably recognizes the meaning of about 1,000,000 words of English. However, this is but a part of the total amount of information that the teenager has stored. Consider, for example, the number of faces and places that the teenager can recognize on sight.
The use of words is the basis of the advanced problem solving intelligence of human beings. A large part of a person's memory is in terms of words and combinations of words. But while language greatly expands the number and the kind of things a person can remember, it also requires a huge memory capacity. It may well be this capacity that distinguishes humans, setting them apart from other animals.
本文是一篇说明文,介绍的是与memory相关的情况:定义,记忆存在的形式,以及记忆的作用。
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