Sometimes, it's the stress or fatigue that makes us feel miserable.

有时候，压力大或是疲劳会让我们感到痛苦。

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These adjectives mean showing the physical effects of anxiety, disease, hunger, or fatigue.

这些形容词都是表现了焦虑、疾病、饥饿或疲惫对身体造成的影响。

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You're stressed. Whether it's caused by life challenges, illness, or fatigue, stress depletes you emotionally as well as physically.

当你倍感压力时。生活中的挑战、疾病或劳累都会让你感到压力，而不管是哪一种都会在精神上和体力上击垮你。

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In my case, because titanium does not rust or fatigue appreciably, its useful life is until I die.

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How people interpret some of the physical sensations of exertion or fatigue, such as buildup of lactic acid in muscle or increases in body temperature, can also influence whether they stick with an exercise routine.

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Some common side effects, like nausea, dizziness or slight fatigue, are manageable--especially if the end result is pneumonia or tuberculosis, diseases that were once deadly but now can be treated with antibiotics.

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