But today, almost 50% of people get 6 hrs or less each night.

然而现在，几乎 50% 的人每晚睡 6 小时或更少。

If that tires you out and you sleep more than 6.8 hrs, you're getting more than the majority.

如果那使你精疲力尽，睡了超过6.8个小时，那么你的睡眠时间就比大多数人都要多。

And, if you get 4 hrs of sleep for 11 days, it's like you haven't slept for 48 hrs straight.

而且，如果你连续 11 天睡 4 小时，那就像你连续 48 小时没睡一样。

The vast majority of research on the topic has concluded that around 8 hrs of sleep is optimal for the average person.

关于这个话题，绝大多数研究得出结论，对普通人来说，大约 8 小时的睡眠是最佳的。

Not so surprisingly, those who get 8 hrs of sleep over a 2 weeks period, show very few lapses in attention and no cognitive decline.

毫不奇怪，那些在两周内睡了 8 小时的人，注意力更集中，认知能力也没有下降。

But those groups that recieved either 6 or 4 hrs of sleep see declining PVT results on almost a daily basis for the entire 2 week period.

但那些只睡 6 或 4 小时的组在整个 2 周期间几乎每天都会看到 PVT 结果下降。

When looking at the results deeper, scientists concluded that getting 6 hrs of sleep for 10 days in a row was the same as not sleeping for 24 hrs straight.

当深入研究结果时，科学家得出结论，连续 10 天睡 6 小时和连续 24 小时不睡觉是一样的。

Of course, the 4 hrs group performs the worst, but these results don't just show a loss of concentration, they show full lapses in awareness called microsleeps.

当然，4 小时组的表现最差，但这些结果不仅显示注意力不集中，还显示了被称为微睡眠的意识完全丧失。

But perhaps the scariest fact is that even after one night of 4-5 hrs of sleep, your natural killer cells, which stop cancer cells from proliferating in your body drop by 70%.

但也许最可怕的事实是，即使只睡4-5个小时，你体内阻止癌细胞增殖的自然杀伤细胞也会减少70%。

Ireland has won Eurovision the most times of any country: 7 times, while Israel spends the most amount of time on social media at 11.1 hrs per person per month.

爱尔兰赢得欧洲电视网的次数是所有国家中最多的：7 次，而以色列花在社交媒体上的时间最多， 每人每月 11. 1 小时。

Chronic lack of sleep is also linked to bowel, prostate and breast cancer and people over 45 who sleep under 6 hrs a night are also 200% more likely to have a heart attack or a stroke.

长期睡眠不足也与肠癌、前列腺癌和乳腺癌有关，45 岁以上每晚睡眠不足 6 小时的人患心脏病或中风的可能性也高出 200%。

But your brain slowly begins to shut off the areas associated with planning and making decisions, and, even though you may still feel fine getting 6 hrs, the truth is actually much darker and worrisome that you might realize.

但是你的大脑慢慢地开始关闭与计划和决策相关的区域，即使你可能仍然觉得睡6个小时也没什么问题，事实上比你意识到的可能还要糟糕和令人担忧得多。