what facctors may weaken one's memory?

what facctors may weaken one's memory? what factors may weaken one's memory ? What factors may weaken one's memory? what factors may weaken one's menory?用英语回答 fade from one's memory pipe one's eye with happy memory Live forever in one's memory What's one's 英语首字母填词题目What's a good friend like?One may have (d) answers 请求翻译英文that may be true but he's just one pilot captain what' What is the main reason for one with poor memory? What's one and one?