求翻译：另据传说，明代有位书生，每次临考都是头昏心慌、文思枯竭，屡试不中。后来他遵照医嘱食用核桃仁。一年后，这名书生记忆力大增，临考不怯，才智过人，中了进士。是什么意思？

According to another legend, a scholar of the Ming dynasty, is dizziness dismayed, with Evans p exam each time dried up, try not. Then he follow the doctor's advice to eat walnuts. A year later, this scholar greatly increased memory, Pro exams not cowardly, wit, jinshi.