Chuck Yeager first broke the sound barrier in his rocket-powered X-1 in 1947, so it's staggering to think that just 23 years later, we stood poised to take our leisure travel supersonic as well.

1947年，查克·耶格尔用火箭动力的X - 1第一次突破了音障，让我们吃惊的是，仅仅23年后，我们在休闲旅行中已经可以享受超音速飞行。

youdao

Let me suppose X is 1. So I'll take X to be 1, then Y should be 2. Right?

假设X是1，将1代入x，然后Y应该为2，对吗？

youdao

The first leg of the call starts as soon as the caller makes the call and is billed as follows: Leg 1 rate x Leg 1 duration.

呼叫的第一档从呼叫者发出呼叫就立即开始，并按如下方式计费：Leg 1 rate x Leg 1 duration。

youdao

The first plane ever to fly faster than the speed of sound was the X-1 in nineteen forty-seven.

VOA: special.2010.07.07

Remember, we don't do a one-to-one correlation, because p x and p y are some linear combination of the m plus 1 and m minus 1 orbital.

记住，我们不需要把它们一一对应，因为ｐｘ和ｐｙ轨道是,ｍ等于正负１轨道的线性组合。

麻省理工公开课 - 化学原理课程节选

It's still 1, because you plus plussed the wrong symbol called X. So for now, take-away from this, don't do this.

它还是1，因为你自增的是那个错误的叫做X的符号,现在，拿走这个，不这样做。

哈佛公开课 - 计算机科学课程节选

Called Cygnus X-1, it is about 6, 100 light years away.

WSJ: NASA NuStar Telescope to Hunt for Black Holes

X-1 to his second choice, and so on.

ECONOMIST: The mathematics of voting

The large wheels also create the necessary space for installing the BRABUS high-performance brake system with 12-piston aluminum fixed calipers and 380 x 36-mm (15.0 x 1.42 inches) vented and cross-drilled discs in front, and 355 x 28-mm (14.0 x 1.1 inches) discs and six-piston aluminum fixed calipers on the rear axle.

ENGADGET: Brabus iBusiness luxury sedan puts an iPad at every seat, a Magic Mouse at every hide-covered armrest