这句话有语境的吧?如果我没记错是培根的《论读书》,原文是if a man write little,he had need have a great memory;我觉得这样翻译比较好不常做笔记的人必须记忆力很好.
还有,这句用到一个句型：
Had need(to) do sth.应该做某事 Have need to do sth.必须做某事