资料图:微量电击大脑

　　Passing the current one way through the brain made the students better with figures - and the effect lasted for up to six months. But, worryingly, running the electricity the other way made them dramatically worse.

　　实验证明，单向电击大脑有助于学生的数字认知，其效果能持续六个月。但是令人担忧的是，从另一侧通过电流则会让学生的数字认知变得很差。