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Stimulating the brain with rapid pulses of electricity can improve your ability to perform mental arithmetic for up to six months, a new study has shown. 一项新的研究显示，用电流速脉冲刺激大脑可以提高你的心算能力，效果可长达六个月。 For anyone who struggles with dividing the bill at the end of a meal, there is now a way to give your brain a boost. 对于那些餐后与账单苦苦斗争的人们来说，这是给你的大脑一个推动力的好方法。 Scientists have shown they can improve people’s ability to perform mental arithmetic for up to six months by giving them a short course of harmless electrical stimulation on their scalps. 科学家已经表示，他们能够通过无害的电流冲刺激头皮，提高人们长达六个月的心算能力。 Volunteers who received rapid pulses of electrical current – equivalent to that from an AA battery – for just 20 minutes a day for five days saw their ability to solve calculations improve by 28 per cent. 持续五天每天20分钟接受电流刺激（相当于AA电池）的志愿者，发现他们的计算能力提升了28%。 The enhancement, which made them faster at carrying out sums and other mathematical tasks, lasted for up to six months after receiving the electrical treatment. 这种提升在接受电击后持续了六个月，使得志愿者在计算总数时和其他数学工作中更快速。 | 
