We have an ace in the hole. In fact, we have two.
我们手中有王牌 事实上是两张
It's called Mars Reconnaissance Orbiter and Mars Odyssey.
它们是火星侦察轨道器和"奥德赛"卫星
So, these are two orbiters that we have around Mars already.
这两颗都是我们已有的火星人造卫星
They're sitting there, they're waiting for their sister to come.
它们在轨道上运行 等待新的伙伴加入
As the Martian night obscures the rover from Earth's view,
火星夜晚阻碍了地球对火星车的监测
Odyssey will attempt to relay its vital messages
"奥德赛"号将尝试把重要信息
back to the control room.
转发回控制中心
This is just one of hundreds of risky procedures
这只是为确保好奇号安全着陆
that must go right for Curiosity to land safely.
众多挑战之一
In designing the most complex landing ever attempted in space,
为了设计目前最复杂的太空降落程序
the team have had to go out on a limb,
研究团队不得不冒险
staking their reputations on a system
将他们的名誉寄托于
that has never been used before.
一个从未使用过的系统
It's so ambitious.
这是如此雄心勃勃
It's so audacious.
这是如此大胆创新
It's so unconventional.
这是如此打破常规
It doesn't feel like there's a lot of shelter.
我们并没有很多保证

重点解释：

1.wait for 等候； 等待

例句：She has impatience to wait for the bus.
她没有耐心等公共汽车到来。

2.attempt to 企图, 努力

例句：I would be the last to attempt to answer the question.
我是最不可能去尝试回答这个问题。

3.out on a limb 处境危险

例句：With our supplies cut off,we were out on a limb.
由于给养被切断，我们陷入了困境。