If you're missing out on sufficient shut-eye-most likely seven to eight hours a night-you're probably irritable, dealing with mind fog, and have difficulty managing daily tasks.

如果你缺乏充足的睡眠(每天约七至八个小时)，那么你很有可能焦躁易怒，脑子里一团乱麻，无法正常处理日常事务。

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He went through the day with his mind in a fog.

整整一天，他的头脑都是昏昏沉沉的。

《牛津词典》

This time, despite the same dense fog, she swam with her faith intact and her goal clearly pictured in her mind. She knew that somewhere behind that fog was land and this time she made it!

这一次，尽管雾还是那样浓，但她始终带着必胜的信念，头脑中始终有一个清楚的目标，她知道雾后面的某个地方就是陆地，这一次她成功了！

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