请求英语达人，帮我翻译一段文章，不长，谢谢
Most people are surprisingly bad at spotting fake smiles. One possible explanation for this is that it may be easier for people to get along if they don't always know what others are really feeling.
Although fake smiles often look very similar to genuine smiles, they are actually slightly different, because they are brought about by different muscles, which are controlled by different parts of the brain.
Fake smiles can be performed at will, because the brain signals that create them come from the conscious part of the brain and prompt the zygomaticus major muscles in the cheeks to contract. These are the muscles that pull the corners of the mouth outwards.
Genuine smiles, on the other hand, are generated by the unconscious brain, so are automatic. When people feel pleasure, signals pass through the part of the brain that processes emotion. As well as making the mouth muscles move, the muscles that raise the cheeks – the orbicularis oculi and the pars orbitalis – also contract, making the eyes crease up, and the eyebrows dip slightly.
Lines around the eyes do sometimes appear in intense fake smiles, and the cheeks may bunch up, making it look as if the eyes are contracting and the smile is genuine. But there are a few key signs that distinguish these smiles from real ones. For example, when a smile is genuine, the eye cover fold - the fleshy part of the eye between the eyebrow and the eyelid - moves downwards and the end of the eyebrows dip slightly.
Scientists distinguish between genuine and fake smiles by using a coding system called the Facial Action Coding System (FACS), which was devised by Professor Paul Ekman of the University of California and Dr Wallace V. Friesen of the University of Kentucky.
谢谢了
虽然假的微笑常看起来很像真正的笑容，实际上它们的，因为他们是由于不同的肌肉所受的不同部分。
假笑还可执行，因为脑的信号，他们的大脑中的意识和提示zygomaticus主要的肌肉的脸颊。这就是肌肉，使人嘴巴。
真诚的微笑，另一方面，生成的头脑，不是自动的。当人们感到高兴，讯号在通过这一部分的过程。同时使政府的嘴巴肌肉的运动，肌肉发达，把两颊
线的眼睛有时确实会出现在强烈的假笑，脸上会挤，看来这是眼、的微笑是真挚的。但有一些迹象表明这些不同的微笑的。例如，一个微笑是真挚的，眼罩把——那肉的两眉，眼睑——动作，结束的眉毛稍微倾斜。
科学家区分真正的、假笑使用编码系统的脸部表情动作编码系统(facs)，是保罗的教授ekman加利福尼亚大学的博士和华莱士v。friesen大学的肯塔基州。
好了，但是我要问一下，你要这个干嘛呀？
尽管假笑经常看起来很相似,他们实际上是真诚微笑略有不同,因为他们所带来不同的肌肉,这是由计算机控制的大脑的不同部位。
假笑可以随意的,因为大脑信号,创造他们来自有意识的大脑部位和提示zygomaticus主要肌肉收缩脸颊上。这些肌肉拉的嘴角朝外。
真诚的微笑,另一方面,是由无意识大脑,所以是自动的。当人们感到愉悦、信号通过的大脑部分过程的情感。除了进行口腔肌肉感,肌肉,提高脸颊——上睑提和支护结构,orbitalis -也合同的眼睛,眉头皱稍微下降。
有时候确实线眼睛周围的出现在激烈的假笑,脸颊会挤在一起,使它看起来好像眼睛是承包和微笑是真品。但是有一些关键的迹象表明,区分这些微笑从真正的问题。例如,当一个微笑是真诚的,眼盖褶皱-肌肉部分之间的眉毛,眼睛向下移动的眼皮——和眉毛的浸。
科学家区分真实和假笑采用编码系统称为面部动作编码系统(FACS),设计了由教授保罗·埃克曼的加利福尼亚大学的博士Friesen v .华莱士和肯塔基大学的。
希望可以帮到您，愿生活愉快~~~~
