由于眩晕、虚弱和注意力减退，他感到车子急速地朝旁边的栏杆和树林边滑去。
Dizzy, weak, his concentration fading, he felt the van slide straight for the rail and the woods beyond.
当我们被逼着读一段或两端书的时候，我们的注意力就会减退。
We live in an age when peoples' attention wanes when they have to read more than a paragraph or two.
多巴胺被认为是“快乐激素”，产生喜悦感；去甲肾上腺素类似于肾上腺素，导致心跳加速和兴奋感，据来自美国罗格斯大学的人类学家，著名的爱情研究者Helen Fisher所说，这两种化学物质共同引起喜悦感，充沛的精力，失眠，强烈的愿望，食欲的减退和集中的注意力。
Dopamine is thought to be the "pleasure chemical, " producing a feeling of bliss. Norepinephrine is similar to adrenaline and produces the racing heart and excitement.
你也可能感觉悲伤、压抑，或无法集中注意力或记忆力减退。
You might feel sad or depressed, or have trouble concentrating or remembering things.
情绪波动。睾丸素偏低可能会令人意志消沉或缺乏自信。你也可能感觉悲伤、压抑，或无法集中注意力或记忆力减退。
Emotional changes. Low testosterone might contribute to a decrease in motivation or self-confidence. You might feel sad or depressed, or have trouble concentrating or remembering things.
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.
我记得自己小时候正是六七十年代，我上学的注意力在减退。
I remember, as a child of the '60s and' 70s, my own attention deficit in school.
轻度贫血患者自觉经常头晕耳鸣、注意力不集中、记忆力减退。
Mild anemia in patients with tinnitus and dizziness often consciously, concentration, memory.
轻度贫血患者自觉经常头晕耳鸣、注意力不集中、记忆力减退。
Mild anemia in patients with tinnitus and dizziness often consciously, concentration, memory.
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