Cognitive decline is the loss of ability to learn new skills, or recall words, names, and faces that is most common as we age.

认知能力下降是指丧失学习新技能或回忆单词、名字和面孔的能力，这是随着年龄的增长而最常见的现象。

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Cognitive decline is the loss of ability to learn new skills, or recall words,names,and faces that is most common as we age.

VOA: standard.2010.06.17

In other words, those who had above-average cognitive ability at age 11 also tended to be above average when much older.

WSJ: Intelligence Changes Linked to Genes