求翻译：The id is the most basic part of the personality. It is inborn and develops alone for the first couple of years of life. The id is involved in the satisfaction of the most basic of instincts and operates by ‘the pleasure principle’. For example, babies usually seek pleasure (e.g. food, drink, comfort and warmth) and avoid the unpleasurable (e.g. hunger, being wet and cold). The id is selfish and typically wants immediate gratification.是什么意思？

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