Are We Always Looking at Our Nose?
我们总是在看我们的鼻子？
Your nose is in your field of vision, so you are always looking at your nose.
你的鼻子就在你的视野里，所以你总是在看着你的鼻子。
Luckily, our brains filter out sensory (感官的)information we don't need.
幸运的是，我们的大脑过滤掉了我们不需要的感官信息。
The ability to ignore expected input(输入的信息) is called "unconscious selective attention."
忽视预期信息的能力被称为“无意识选择性注意”。
You don't walk around constantly noticing your nose or your glasses for that matter (if you wear glasses) because it's not useful information.
你不会在走来走去时经常注意到你的鼻子或眼镜（如果你戴眼镜的话），因为这都不是有用的信息。
If nothing is changing with your nose, your brain will decide it doesn't need to register(注意到) it out of efficiency.
如果你的鼻子没有任何变化，你的大脑就会出于效率而决定无需注意它。
It's a Matter of Efficiency.
所以这是关于效率的问题。
You don't need to look at your nose or glasses all day long, so your brain filters it out.
你不需要整天看着你的鼻子或眼镜，所以你的大脑会将其过滤掉。
You don't need to feel every part of your body 24/7(每时每刻), so your brain filters it out.
你不需要每时每刻都感觉身体的每一部分，所以你的大脑会将其过滤掉。
You don't need to hear your mom telling you to stop watching YouTube videos and clean your room, so your brain filters it out.
你不需要听到你妈妈告诉你不要再看YouTube视频了，让你打扫你的房间，所以你的大脑就会将其过滤掉。
The brain is an efficient and calculating machine that continually tries to improve our efficiency.
大脑是一台高效且精明的机器，它不断地试图提高我们的效率。
If our brain were less efficient, our bodies would have to eat more.
如果我们的大脑效率较低，我们就不得不吃得更多。
The brain already takes up 20% of our energy even though it only accounts for 2% of our mass.
因为光大脑就占据了我们20%的能量，尽管它只占我们身体质量的2%。
Sometimes this leads to strangeness, but in the case of our noses, let's be glad for our limited attention and automatic filters.
有时这会有点不可思议，但就我们的鼻子来说，我们要为自己拥有的有限注意力和自动过滤器感到高兴。
