If you've ever seen a bicycle race, you might have noticed the riders lining up behind each other instraight columns.
如果你看过自行车比赛，你或许注意到自行车手们都一个跟着一个排成一队@l4MbZgs5i.%P4。
Bicycle racers spend much of their energy overcoming wind resistance, so this lining up makesgood sense.
自行车手们耗费了很大的能量来克服风的阻力，所以这样的排队方式是很合理的Vw]b6f5J_lnu;h70v|,。
If you ride directly behind your opponent, she'll cut through the air resistance for you, letting you save up energy for the finish line.
如果你直接骑在对手的后面Mp^&eCRK.~b6qwe。他能够为你阻挡空气的阻力，为你冲刺终点保留体力u.I)&8wb]jl^o%F-4q[。
What's true for bicycle racers is true for otherthings too.
对于自行车手适用的道理也同样适用于其他方面的事情895mXGY%ffH]*N@LXNVC。

Going in straight line formation is the best way to overcome wind resistance.
以直线的队列行进是克服风阻力的最好办法1gy2_y=Y3M_pCd9lo。
Which brings us to those silly geese.
这让我们想到了那些愚蠢的大雁！
Like bicycle racers, geese fly in formation mainly to saveenergy.
就如自行车手们那样，大雁们以节省能量的队形飞行JbCa5DliHm|49r%eur。
The formation they prefer however is shaped like the letter “V.”
然而它们喜欢的队形却是“V”字形DG(8k22s_K。
What's going on? Aregeese just plain dumb?
这是怎么回事？难道大雁是傻瓜？
Not at all!
不是这样的t&#=ioOU21N8K。
Remember, geese don't only need to worry about air resistance—they need to stay aloft as well.
记住，大雁不仅需要担心空气阻力-他们同样也需要停留在高空tg#6h;yKg2=@Wm。
To do this, goose wings are curved and tapered like those of an aircraft.
为了做到这一点，大雁的翅膀如弯曲的锥形的飞机机翼一般，
The top surface bulges upward while the bottom stays flatter.
表面凸起向上，底部保持平整rY[Tc5kVFulV]WVb]3。
Air rushes more quickly over the wing'sbulging top, and this creates a kind of upward suction.
空气很快从其翅膀顶部凸起的部分掠过，这就造成了一种向上的吸力，
This phenomenon is called “lift,” and it's agoose's secret for staying aloft.
此现象就叫做“牵引”，这就是大雁能够停留在高空的秘密&CCIsY6k@^。
Lift, however, is a peculiar thing.
然而“牵引”是一种很特殊的东西3dTgI5Q_RAwTy_。
While most of it tugs upward on the goose, some of it spills awayfrom the wing tips as a kind of updraft.
大多数的引力牵引着大雁向上，一些引力则以上升气流的形式从翼尖流出#GQ(EePNYKIiX。
This lingering updraft spreads out behind the goose in aV-shape like the wake of a boat.
这些残留的上升气流像船的尾迹一样在大雁的身后呈V字形伸展开QOKe7p6d4^+Nm~y@3x&[。
If another goose puts its wings inside this updraft wake, it gets anadded upward boost itself.
如果另一只大雁也在这样的上升气流中展开翅膀，它会获得额外的升力来助推自己YO6NsND|vq-l8。
What's the best formation to take advantage of this?
什么样的队形能够最好地利用这个优势？
It's not astraight line, it's a “V”!
不是直线，而是“V”字形Ey!.3.-YEnH,wj)^1。