纪录片《火星任务》 第10期 起重机

In NASA's giant wind tunnel near San Francisco,

在美国宇航局位于旧金山附近的大型风洞

they put it to the test.

他们对其进行测试

Five, four, three, two, one...

五 四 三 二 一

The parachute must be deployed¹ at twice the speed of sound.

降落伞必须能够在两倍音速下张开

Good chute, good chute!

成功张开 成功张开

The tests confirmed

测试证实

the huge canopy² should survive the enormous forces

面对火星大气中的巨大阻力

it will encounter as it's dragged through the Martian atmosphere.

巨大的伞面能够经受住考验

Finally, Curiosity's engineers

最后 好奇号的工程师们

tested the most risky³ part of the landing procedure...

测试了登陆过程中风险最大的一个环节

I think we are ready to go.

应该是准备好了

...a bizarre hovering⁴ crane

一个奇特的天空起重机

that will have to lower the rover down

它将在离地面20米时

the final 20 metres to the surface.

把火星车降到火星表面

The sky crane took the engineers years to perfect.

工程师们花了数年心血才将其完善

It has never been used to land anything before.

在此之前 它还从未用在登陆过程中

1 deployed   

（尤指军事行动）使展开( deploy的过去式和过去分词 )； 施展； 部署； 有效地利用

参考例句：

• Tanks have been deployed all along the front line. 沿整个前线已部署了坦克。
• The artillery was deployed to bear on the fort. 火炮是对着那个碉堡部署的。

2 canopy   

n.天篷，遮篷

参考例句：

• The trees formed a leafy canopy above their heads.树木在他们头顶上空形成了一个枝叶茂盛的遮篷。
• They lay down under a canopy of stars.他们躺在繁星点点的天幕下。

3 risky   

adj.有风险的，冒险的

参考例句：

• It may be risky but we will chance it anyhow.这可能有危险，但我们无论如何要冒一冒险。
• He is well aware how risky this investment is.他心里对这项投资的风险十分清楚。

4 hovering   

鸟( hover的现在分词 )； 靠近（某事物）； （人）徘徊； 犹豫

参考例句：

• The helicopter was hovering about 100 metres above the pad. 直升机在离发射台一百米的上空盘旋。
• I'm hovering between the concert and the play tonight. 我犹豫不决今晚是听音乐会还是看戏。