英语听力：自然百科:行星旅行指南 火星(11)（在线收听）

Before we take this giant leap,

在我们进行这次巨大的飞跃前,

we need to be able to carry everything needed for a 3-year round trip with us.

我们需要准备为期三年往返旅行的东西。

This is a much larger effort than getting to the moon.

这比到达月球要花费更多的努力。

This is the Apollo Mission unstarioates.

这就是目前的阿波罗任务。

At this point, we know at least as much as the engineers knew the time they agreed on to land on the moon.

在这一点上,我们至少知道很多工程师知道他们同意踏上月球。

And they had only 9 years so I think once the nation decides they really want to land humans on the Mars.

他们只有9年,所以我认为一旦国家决定他们真正想要让人类踏上火星的土地。

The system can be designed, developed and built.

该系统可以被设计,开发和建造。

Fast forward to future, after 6-month crossing the blackness of space,

快进到未来,6个月后穿过黑暗的空间,

things suddenly get a lot more interesting.

事情突然就变得愈加有趣。

The combination of higher approach speed,

接近速度越来越高,

a thin atmosphere and twice the gravity of the moon,

一层很薄的大气和月球引力的2倍,

makes Mars one of the hardest places to land in the solar system, even for robots.

这使火星成为了太阳系中最难到达的地方,甚至对机器人而言也是如此。

You hit the top of the Martian atmosphere.

你挑战的是火星的大气层。