Russia's military says the hypersonic missile can travel 2,000 kilometers and flies 10 times faster than the speed of sound, which makes it hard to shoot down.

俄罗斯军方表示，这种高超声速导弹可以飞行2000公里，飞行速度是音速的10倍，这使得它很难被击落。

You can only see it in museums now, not the skies but when it was airborne the Concorde could cruise at twice the speed of sound.

你现在只能在博物馆里看到它，不是在空中，而是在空中飞行时，协和式飞机可以以两倍于音速的速度飞行。

And our first story concerns a weapon that said to be hypersonic, meaning it would travel at several times the speed of sound.

我们的第一个故事是关于一个据说是特超音速的武器，这意味着它的传播速度是音速的几倍。

The sound is obviously propagating at the speed of sound, right?

声音显然是以音速传播的，对吧？

Government controlled media in North Korea said the missile was hypersonic, meaning it could fly as fast as 20 times the speed of sound and be nearly impossible to shoot down.

朝鲜政府媒体表示，这枚导弹是超音速的，这意味着它的飞行速度可以达到音速的20倍，几乎不可能被击落。

And my Supersonics coaches George Karl and Tim Gergich, thank you very much.

还有我在超音速效力时的乔治·卡尔教练和蒂姆·格里奇教练，非常感谢你们。

It's very expensive to fly faster than the speed of sound.

飞行速度超过音速是非常昂贵的。

Next, we're looking at how NASA is aiming to take commercial travel to supersonic speeds.

接下来，让我们了解一下美空天局是如何致力于将商业旅行速度提升到超音速的吧。

Supersonic describes speeds that are greater than the speed of sound.

超音速描述了大于音速的速度。

Things like inflatable drag devices, that we could inflate at the speed of sound.

比如可在音速速度下充气的减速装置。

Now to a story about the impact that space junk is having, on the moon, and by impact, I mean, literally, a piece of SpaceX Falcon 9 Rocket slammed into the moon earlier this week at nearly seven times the speed of sound.

接下来我们来看一则太空垃圾撞击月球的新闻，这里所说的撞击并非比喻，本周早些时候，太空探索技术公司猎鹰9号火箭的一块残骸以接近七倍音速的速度撞上了月球。

He was on top of the world, an unbelievable 135,000 feet, that's four and a half Mount Everest high, and he became the first person ever to skydive at a supersonic speed.

他站在世界之巅，令人难以置信的13万5千英尺高，相当于珠穆朗玛峰的4.5倍，他成为第一个以超音速跳伞的人。

A change in regulation could lead to a surge of investment in the next generation of commercial supersonic aircraft, making travel faster than the speed of sound, more accessible to everyone.

法规的改变可能会导致对下一代商用超音速飞机的投资激增，以后的飞行速度有望都以超音速进行，人人都得以体验。

So this magnificent piece of engineering is fast enough, if you just push it a little bit, to outrun its own sound, so the sound barrier is negotiable.

看来只要方法得当，这架飞机还是能超越音速的，所以声音的壁垒并非坚不可摧。

She makes some extra cash by calling herself " Dr. Hannah" on commercials and selling wheatgrass and spinach capsules that claim to give you supersonic hearing.

她在广告中称自己为“汉娜医生”，并出售声称能给你超音速听力的小麦草和菠菜胶囊，从而赚了一些额外的钱。

In two or three years it will be possible, because of the new supersonic jets, to fly from New York to London in two and one-half hours.

再过两三，由于 新的超音速喷气式飞机的发明，从纽约飞到伦敦有可能只用两个半小时。

In addition to flying at extremely high speeds, hypersonic weapons are designed to move in ways that make them difficult to find and destroy in flight.

除了以极高速度飞行以外，高超音速武器的移动方式在飞行中很难被发现和摧毁。

Traveling at twice the speed of sound, an enormous asteroid made its way into our inner solar system, on a collision course with the dinosaurs.

一颗巨大的小行星以音速两倍的飞行速度，迎头闯进我们的内太阳系，将要撞击到恐龙的世界。

There's only a short time window of 60 to 90 seconds to find a tiny thing in the sky, moving at Mach 12.

需要在短短60到90秒的时间在天空中寻找以12马赫（12倍音速）运动的微小物体。

The answer is extremely, wickedly fast wind, possibly up to 22,000mph, equal to 10km per second or nearly 29 times the speed of sound.

这要拜它无法无天的狂风所赐，时速高达 22000 英里的狂风，换算为每秒十公里，大约相当于音速的 29 倍。