纪录片《火星任务》 第10期 起重机（在线收听） |
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 deployed 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 canopy 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 risky 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 hovering 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 |
| 原文地址：http://www.tingroom.com/lesson/jlphxrw/532308.html |