如果你感到疲劳到失去视觉焦点这一极限时，无论如何，你都应该坚决不再操作大型机器。
If you feel tired to the point of losing visual focus, you should definitely not be operating heavy machinery - no matter what.
如果你感到慢性疲劳，这也许是甲状腺机能减退的征兆。
If you are chronically fatigued, it may be a symptom of hypothyroidism.
如果你正在练习半马或者全马，毫无疑问会在长跑后感到疲劳。
If you're training for a half marathon or marathon, it's definitely normal to feel tired after long runs.
如果时差或巨大的日程差别让你感到疲劳，那么就减少你的旅行锻炼或者比平时减轻些。
If jet lag or extreme schedule changes leave you exhausted, make your travel workout shorter or lighter than usual.
如果你感到莫名的疲劳，而且持续时间较长，问问医生是否需要检查血糖。
If you have persistent, unexplained fatigue, ask your doctor about being tested for diabetes.
如果你的生意是依赖于一些很火的流行趋势，那你就要留心用户何时会对其感到疲劳以及寻找下一个流行元素。
If your business relies on popular trends, it pays to watch for signs of user fatigue and what may be next.
检查是否有眼疲劳。方法是将手放在前额呈敬礼状。如果这时候你的眼睛感到放松，那么你的办公空间就太明亮了。
Check for eyestrain by putting your hand to your forehead in a salute. If your eyes feel relieved, your work space is too bright.
如果象这样使你的手和臂保持几秒钟，即使没有演奏，你前臂屈肌范围内也有可能感到疲劳。
If you hold your hand and arm like this for a few seconds, even without playing, you will feel fatigue in the forearm flexor area.
如果你对着电脑屏幕数小时，那么你的眼镜与身体一定会感到疲劳。
Staring for hours on end, at a computer screen can also stress your eyes and body.
如果你太瘦弱的话，你就会感到疲劳而且容易生病。
If you're too thin, you'll often feel tired and you'll be more likely to get sick.
但是如果你比较懒惰感到疲劳，多活动一下就好了。”他说。
But if you're physically inactive and fatigued, being just a bit more active will help, " he added."
如果你的眼睛感到疼痛，做眼操可以缓解你的视力疲劳。
If your eyes are aching, doing some eye exercises can relieve your eye tiredness.
如果你的眼睛感到疼痛，做眼操可以缓解你的视力疲劳。
If your eyes are aching, doing some eye exercises can relieve your eye tiredness.
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