Some people are very forgetful, while others can remember everything they have done. Scientists know a lot about how our brains keep and remember facts and experiences. ____①____ There is little study on how or why the brain forgets things. A new study looks at forgetting. A team of scientists from the USA studied the brain's process of forgetting things. They study the brain and how it thinks and works. Their work may help people who have memory (记忆) problems. It may also help those with depression and dementia (抑郁症和痴呆症). ___②___ The lead scientist, Marie Banich, said, "It may sound surprising that people can decide what and how they forget. "
Professor Banich said forgetting is important. She said it keeps the brain working well. Her study found ways that people take information away from their brain. She said, "We have control (控制) over the ability to take information away from…our thoughts. "___③___ However, although we can control what and how we forget, the act of forgetting is difficult and needs a lot of energy (能量). Another scientist, Sara Festini, agreed. She said, "We've found that the act of forgetting no-longer-relevant (不相关) information from the mind is good for people, but it doesn't happen by the brain itself. " ___④___ Researchers will now look at why we forget recent things, like where we left our keys.
