纪录片《火星任务》 第11期 天体都在运动（在线收听）

Planning the journey

计划整个旅程

was the first challenge for Joel Krajewski's

是乔尔·克拉耶夫斯基的工程小组

engineering team.

面对的首个挑战

Go, go, go, go, go!

冲 冲 冲

Nice job!

干得好

As Flight Director,

而飞行指挥官

Joel's colleague Brian Portock

乔尔的同事布赖恩·波尔托克

is, in effect, the mission's quarterback.

则相当于此次任务的四分卫

It's Brian's job

布赖恩的工作

to aim and throw the spacecraft across the solar system

就是让航天器穿过太阳系

to a moving receiver...

准确抵达移动的外接球手

..Mars.

火星

Everything's in motion in space.

太空中的天体都在运动

Run in, run in!

前插 前插

Mars is moving round the Sun

火星绕着太阳转

and the Earth is also moving round the Sun,

地球同样绕着太阳转

and their motion relative to each other is changing.

它们之间的相对位置随时在变

Go, go, go, go!

冲 冲 冲

Similar to a receiver running out for a pass is in motion...

就像外接球手穿插时会不停改变位置

Ball!

接球

...and the quarterback needs to stand back and throw a ball,

而四分卫站在后面扔球

so that the receiver and the ball

球和人都必须

meet at a point in space and a time

在恰当的时间抵达恰当的位置

that's the correct one so that they can catch it.

这样才能接住球