All you need is a jetliner, a parabola and voila, you're weightless.

你需要的只是一架客机, 飞行个抛物线, 然后看看自己, 你已经失重了。

But because gravity makes the ball's trajectory a parabola, the air pushing against the ball changes directions as it flies.

但是因为重力使球的轨迹呈抛物线，所以当球飞行时，推动球的空气改变了方向。

An escape orbit is open — it doesn't come back — and is shaped like a parabola.

轨道是开放的——它不会回来——形状就像抛物线。

The orbit is now a hyperbola, which is similar to a parabola, but is even more open.

这种轨道是双曲线，类似于抛物线，但更加开放。

There are 31 parabolas per flight.

每次飞行有 31 抛物线。

Instead of a parabola that just goes like this.

而不是像这样的抛物线。

Or you could even think of it as a three-dimensional parabola.

或者您甚至可以将其视为三维抛物线。

He drew parallelogram and parabola up to par.

行四边形和抛物线都是达到标准的。

Mathematically, the value of eccentricity varies between zero and one; with zero representing a circle and one transforming into another shape, called a parabola.

在数学上，偏心率的值在0和1之间变化，零代表一个圆，一个转换成另一种形状，称为抛物线。

The Greek mathematicians know the properties of the parabola and so could have directed the assembly of small mirror pieces into the parabolic shape.

希腊数学家知道抛物线的性质， 因此可以将小镜子碎片组装成抛物线形状。

An orbit with an eccentricity greater than one is no longer an ellipse but a parabola if e is equal to one a hyperbola if e is greater than one.

偏心率大于 1 的轨道，如果 e 等于 1，它就不再是椭圆而是抛物线，如果 e 大于 1，则是双曲线。

For three weeks, they practiced and performed as the plane did parabolas climbing until it goes over the hump, creating 27 seconds of weightlessness-time to open luggage and release a zillion balls.

们为此训练了3周, 在飞机开始抛物线攀升, 直到已经稳过关, 创造出27秒的失重状态后, 是时候打开行李, 开始一段震撼人心的表演了。

Directly it was suspected they would either kill you at once and save themselves further useless effort, or let you recover sufficiently so that your nerves had crept back to the other side of the parabola.

直接怀疑们要么立即杀了你， 让们自己省下更多无用的努力， 要么让你充分恢复， 这样你的神经就会回到抛物线的另一边。

She was composed, Anthony perceived, of a succession of semicircles and parabolas, like those figures that gifted folk make on the typewriter: head, arms, bust, hips, thighs, and ankles were in a bewildering tier of roundnesses.

安东尼认为，她是由一连串的半圆和抛物线组成的，就像有天赋的人在打字机上打出的那些数字：头部、手臂、胸部、臀部、大腿和脚踝呈令人眼花缭乱的圆形。