当人们睡眠不足时，会出现注意力下降、记忆力减退以及思维僵化。
When people lose sleep, their concentration drops and they suffer memory lapses.
此外，那些常受高压折磨的人更容易失眠，超重，注意力下降和易怒。
In addition, people who suffer from high levels of stress tend to have trouble sleeping, be overweight, have trouble concentrating, and are easily irritated.
因为我是压轴的主旨演讲人，本来我还担心听众会过于疲劳，注意力下降，但事实证明我是多虑了。
Since I was the closing keynote speaker, I had some slight concern about audience fatigue and attention levels at that stage in the day, which turned out to be misplaced.
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