Why do people have bad memories?

First of all, you should know that forgetting is a common psychological phenomenon, and you don't have to worry about your "bad memory". Secondly, forgetting is also regular. The law of forgetting is "fast first, then slow, then more and then less", which was first discovered by psychologist Ebbinghaus. Improve the level of knowledge processing

Psychological research has found that if learners can deeply process knowledge when learning it, they will have a deeper memory of knowledge, keep it for a longer time, and get more clues when extracting it, which will help them to recall.

The so-called deep processing refers to a thorough and meticulous understanding of the meaning of the learned content, so that new knowledge can be firmly and accurately linked with old knowledge and incorporated into the existing knowledge structure. For example, reciting an ancient poem will be easier to remember if you really understand its meaning, background and overall structure. If you recite poems mechanically only by rhythm and words, the efficiency will be very low.

For another example, the best way to remember a mathematical formula is to find out how this formula is derived, what is its significance, and what is its relationship with other formulas, so that it can be remembered more firmly; If only according to the formula, which numbers and letters are composed will be more difficult to remember and not easy to forget.