These droplets are suspended in a vertical wind tunnel.

这些水滴悬浮在一个垂直的洞。

In 1947, there was no wind tunnel data beyond Mach 0.85.

1947那时还没有洞实验数据，只有0.85马赫这个数据。

Undiscouraged, they started experimenting on their own in a small wind tunnel they built.

但两人并不气馁，他们随后开始在自己建造的小洞里进行试验。

Droplets suspended in a vertical wind tunnel are experiencing the same net forces as falling raindrops.

悬浮在垂直洞中的水滴正在经历与下落雨滴相同的净力。

That, combined with data from their wind tunnel experiments, allowed the brothers to build a much more successful glider.

这个数字与他们洞实验的数据相结 ，使莱特兄弟能够建造一架更为成功的滑机。

So Telnack brought wind tunnel testing into the design process.

因此， Telnack 将洞测试纳入了设计过程。

An object floating in a wind tunnel is experiencing the same net forces as an object falling at terminal velocity.

漂浮在洞中的物体正在承受与以最终速度下落的物体相同的净力。

The shells adoring the winding tunnels form intricate and colorful patterns.

贝壳装饰着蜿蜒的隧道， 形成复杂多彩的图案。

To do so, we often run some virtual wind tunnel tests and optimize our design until we're happy with the results.

为此，我们往往进行一些虚拟洞测试，并优化我们的设计，直到我们对结果满意为止。

The wind tunnel also helps engineers test the strength of a buildings design.

洞还可以帮助工程师测试建筑设计的强度。

One of the coolest things in the wind tunnel was to see water floating.

洞中最酷的事情之一就是看到水漂浮。

I've got a wind tunnel that can show you exactly how that works.

我有一个洞可以准确地向你展示它是如何工作的。

I frequently felt as if I were walking in some kind of sadistic wind tunnel.

我常常觉得自己好像在某种虐待狂洞中行走。

[Derek] Adam built a custom wind tunnel to witness this for himself.

- [Derek] Adam 建造了一个定制洞来亲眼见证这一点。

I mean, I feel like I'm living inside of this wind tunnel.

就感觉自己站在口。

At times it was down so long and winding a tunnel that the digging was hopeless.

有时它下沉很长， 而且是一条蜿蜒曲折的隧道， 以至于挖掘毫无希望。

During wind tunnel tests, the airflow around the  wing caused the nose to suddenly pitch upward.

在洞测试期间，机翼周围的气流导致机头突然向上倾斜。

The U.S. Air Force, one commentator has written, has put them in wind tunnels to see how they do it, and despaired.

“美国空军，”有一位评论员写道，“把它们放在洞里，看看它们是怎么表现的，结果感到望尘莫及。”

NARRATOR: One team is about to fly their model in a wind tunnel.

旁白：一个团队即将在洞中驾驶他们的模型。

And when the feather was placed in a wind tunnel, the high frequency sound was heard once again.

当羽毛被放在洞中时，高声音再次响起。