mild cognitive impairment       
noun [ C or U ]  medical specialized uk/ˌmaɪld ˌkɒɡ.nɪ.tɪv ɪmˈpeə.mənt/ us/ˌmaɪld ˌkɑːɡ.nɪ.t̬ɪv ɪmˈper.mənt/
 轻度认知缺损
a problem with some mental abilities, such as remembering, but nothing bad enough to affect someone's daily life
  People with mild cognitive impairment have an increased risk of developing dementia. 轻度认知缺损者得痴呆症的风险较高。