Common associated symptoms are difficulty with memory, concentration and thinking, and daytime sleepiness, including sleepiness while driving.

与此同时产生的症状一般有记忆力衰退、难以专心做事与思考、白天嗜睡，包括开车嗜睡。

youdao

A lack of zinc and iron can result in memory lapses, poor concentration, and of course other ailments throughout the body.

锌和铁的缺乏将导致健忘，注意力不集中，以及身体其它部分的疾病。

youdao

The headmaster, Yang Peihua, explains tactfully that they help improve memory and concentration and instil "morality".

杨培华校长解释说，功夫有利于增强记忆、灌输道德规范。

youdao

The guidelines also state that people who have had strokes should be screened for cognitive problems, such as memory or concentration impairment, "as soon as is practicable".

BBC: NEWS | Health | 'Action needed on mini-strokes'

Bayer, sensing the public's confusion about such products, decided not to cite herbs in the names of its new One-A-Day preparations but to use tags like Cold Season and Memory and Concentration instead.

CNN: ASIANOW - TIME Asia

Should the parents tell their children: 60% of NFL players have had at least 1 concussion, 26% had 3 or more, collectively claiming loss of memory, concentration, and problems with speech, headaches, and other neurological issues?

FORBES: Connect