英语翻译WalkingYou’re at a party.Somebody hands you a glass.Hey,

英语翻译
Walking
You’re at a party.Somebody hands you a glass.Hey,come on over here!Somebody else shouts.You take a step and the next thing you know you are wearing that tasty beverage.
But why?When we walk,we keep our torsos straight,don’t we?Walking feels entirely steady and constant.So why is it so hard to carry a liquid?
If you doubt the difficulty of this exercise,we suggest you try filling up a bucket with water and carrying it at chest level without spilling any.But try it outside first!
The answer is that although we feel ourselves to be quite steady when we walk,in truth that is anything but the case.
Walking is a complex muscular phenomenon that amounts to allowing yourself to fall slightly forward and then preventing yourself from falling completely by extending your foot.The extended foot halts the motion which was begun partly by gravity and partly by the pushing of the other foot.Now the torso moves over the base of the resting foot which,once the torso has passed it,begins pushing it into a forward fall again until the other foot arrests the motion.
On top of this,we must also constantly prevent ourselves from falling sideways by flexing and releasing the gluteus muscles around our buttocks and hips.That’s why people sway as well when they walk.
This is what walking is:not the smooth,undifferentiated motion that it seems to be,but an ongoing series of up-down,start-stop,and side-to-side maneuvers.No wonder drinks fly!
不要网上的翻译啊~要自己人工翻译的!
一段一段分好段落!

行走
你在一个宴会上,某人给你一杯饮料.有人对你喊：“你好,到这边来!” 你一动身,接下来你将发现你的衣服上撒上了这美味的饮料.
为什么?我们行走时身体不适直立的,不是吗?感觉走路就是完全稳定和持续的,但是为什么我们拿杯液体就这么难呢?
如果你怀疑这个实验的难度,请装满一桶水,放在胸膛的位置不能弄撒,先到外边试试.
答案是尽管我们觉得我们走路时十分稳定,但事实上还像第一实验那样.
走路是个复杂的肌肉现象,相当于先让你的身体微微向前倾,然后通过扩展脚步来防止身体完全倒下.扩展脚步暂时阻止了由于重力和另一个脚的推力导致的运动.身体躯干越过另一个脚,一旦越过,这一个脚就再次成为推动脚,而另一只脚则起到阻止作用.
再者说,我们也必须不断通过弯曲和放松我们臀部和胯部的肌肉来防止向两边倒.这也是我们走路时两边摇晃的原因.
这就是行走：不是像看起来那样平稳的、一成不变的动作,而是一系列上下、启动停止、左右摇摆的机动动作.难怪饮料会撒掉!

手动翻译,已经尽力.
再问： http://zhidao.baidu.com/question/466304778.html#reply-box-1160875708 可以帮忙翻一下这篇吗？谢谢