胃和肌肉一样，也需要时间休息，为下一次进食做准备。如果老是在吃的话，那胃就会疲倦，人也会感到疲劳。
Like a muscle, it needs time to recover and prepare itself for the next food intake, but if it's constant, it'll get tired and that's when you'll feel tired too.
我不是真的身体疲劳了，更多的是精神上疲倦了。
I'm not really physically tired; I'm more fatigued mentally.
当然，你也可以因为其他原因感到疲倦或疲劳。你怎么能分辨与心脏病有关的疲劳和其他类型的疲劳？
Of course, you can also feel tired or fatigued for other reasons. How can you tell heart-related fatigue from other types of fatigue?
通常这会出现在第三天，我们累计了头两天的疲惫，你度过三个漫长的小时和聚精汇神的三天，你会感到很疲倦，身体也会有种疲劳感。
Usually that third day, guys are tired from the first two days. You go three long hours and the third day is always mental. You're tired.
参与者要完成一份包括14项有关工作压力的调查问卷，程度包括：他们感觉疲劳的次数、身体上的疲倦以及精神上的疲倦。
Participants completed a 14-item survey on job burnout, rating how often they felt emotionally exhausted, physically fatigued, and mentally weary.
医生们不知道慢性疲劳综合症的致病原因。该病的特征是使人虚弱无力的疲倦、慢性疼痛，症状的轻重则可能随时间变化。
Doctors don't know what causes chronic fatigue syndrome, characterized by debilitating fatigue and chronic pain with symptoms that can wax and wane over time.
只有有了强健的身体才能高效的学习而不觉疲倦，否则疲劳或疾病就会影响学习。
Only when you have a strong body can you keep on studying without felling fatigue. Otherwise your study will be interrupted from time to time by fatigue or sickness.
葡萄糖供应机体和大脑能量，不足为奇，葡萄糖不足会使你极度疲劳，但当你摄入过多葡萄糖时你也会感到疲倦。
Glucose supplies energy to the body and brain. It's not surprising that not enough glucose will make you extremely tired. But the same is true when you ingest too much.
这条消息对患者来说，令人激动，因为CFS是一种导致患者长期疲劳，感到虚弱的疾病。对这种疲倦感无法做出简单的解释，当然，也就没有一丝治愈的希望。
The news was exciting for patients because CFS is a debilitating disorder of long-term tiredness for which there is no simple explanation, and certainly no sniff of a cure.
这条消息对患者来说，令人激动，因为CFS是一种导致患者长期疲劳，感到虚弱的疾病。对这种疲倦感无法做出简单的解释，当然，也就没有一丝治愈的希望。
The news was exciting for patients because CFS is a debilitating disorder of long-term tiredness for which there is no simple explanation, and certainly no sniff of a cure.
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