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Some people seem to have extraordinary (非凡的）memories. Zheng Aiqiang, a “memory athlete” on TV show Super Brain, can remember 2,660 numbers in just one hour!
You would think people like this have special brains. But according to a recent study by researchers from the US and the Netherlands, the brain structures（结构）of ordinary people and 23 of the world's leading memory athletes show no difference.
That's because good memories can be trained. New research in the journal Neuron (神经元期刊) suggests that you can become a super memorizer with just six weeks of hard training.
Researchers found that technique (技巧）called loci, invented by ancient Greeks, can greatly help improve memory. By using loci, you are using your imagination to improve the brain's memory networks. You can link（关联）something you need to remember with a place that you know very well. For example, to remember a list of numbers, imagine yourself walking through your house. Each thing is linked to a number. For example, zero could be handle（把手）on the door and five could be the painting on the wall.
In one study, some ordinary people were given 20 minutes to remember 72 words. First they could only remember 26 of them. But when they were taught loci, they could remember 62 words.
“Not everyone can become a memory champion. But everyone using the technique can improve a lot from the level they're at,” said Boris Konrad, one of the researchers in the study.
2HI(g)达到平衡时的标志是( )