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

你需要只是一架客机, 飞行个抛物线, 然后看看自己, 你已经失重了。

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

逃逸轨道是开放——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.

这种轨道是条双曲线，类似于抛物线，但更加开放。

There are 31 parabolas per flight.

每次飞行有 31 条抛物线。

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

但是因为重力使球轨迹呈抛物线，所以当球飞行时，推动球空改变了方向。

Used to play with the parabolas myself.

我自己过去常常玩抛物线。

Instead of a parabola that just goes like this.

而是像这样抛物线。

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。

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

数学上，偏心率值01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 轨道，如果 e 等于 1，就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.

他们为此训练了3周, 飞机开始抛物线攀升, 直到已经平稳过关, 创造出27秒失重状态后, 是时候打开行李, 开始一段震撼人心表演了。

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.

直接怀疑他们要么立即杀了你， 让他们自己省下更多无用努力， 要么让你充分恢复， 这样你神经就会回到抛物线另一边。

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，她是由一连串半圆抛物线组成，就像有天赋人打字机上打出那些数字：头部、手臂、胸部、臀部、大腿脚踝呈令人眼花缭乱圆形。