让我们来一次虚拟的太空行走吧(有声)

1983年４月７日，美国＂挑战者＂号航天飞机在太空飞行期间，两名航天员在太空自由自在地飘飞行走了3个多小时．这是人类首次不系绳索自由地在太空行走．
航天员为何能在太空行走呢？原来，航天员从飞船或航天飞机进入太空时，除了要穿上特制的航天服外，还要背上飞行器，有了它，航天员才能在太空自由＂行走＂。美国宇航员的第一次太空行走

【英文文本】

Twelve men have walked on the moon. And now you can, too. Virtually, that is. Because planetary researchers are enlisting¹ everyday citizens in scientific exploration of the surface of the moon.

At the Web site moonzoo.org, you can check out new high-resolution images taken by NASA’s Lunar Reconnaisance Orbiter Camera. And the team at Citizen Science Alliance, based at Oxford² University, says you’ll then be one of the first to see the moon’s surface in what they call unprecedented³ detail.

This lunar project is a spin-off of the popular Galaxy⁴ Zoo, which has gotten more than 250,000 people around the world involved in actual astronomical⁵ research. For the moon exploration effort, you might, for example, count craters⁶ as you stroll. The researchers say that’s important because it can help them determine the age and depth of the lunar surface. Newer craters could give them clues about recent meteor impacts—and hints about what might be in store for us on Earth. And remember the podcast from April 27th, about a Soviet⁷ reflector found on the moon’s surface after forty years? Who knows what strange object you might find. That’s at moozoo.org
 

1 enlisting   

v.（使）入伍， （使）参军( enlist的现在分词 )；获得（帮助或支持）

参考例句：

• He thought about enlisting-about the Spanish legion-about a profession. 他想去打仗，想参加西班牙军团，想找个职业。 来自辞典例句
• They are not enlisting men over thirty-five. 他们不召超过35岁的人入伍。 来自辞典例句

2 Oxford   

n.牛津（英国城市）

参考例句：

• At present he has become a Professor of Chemistry at Oxford.他现在已是牛津大学的化学教授了。
• This is where the road to Oxford joins the road to London.这是去牛津的路与去伦敦的路的汇合处。

3 unprecedented   

adj.无前例的，新奇的

参考例句：

• The air crash caused an unprecedented number of deaths.这次空难的死亡人数是空前的。
• A flood of this sort is really unprecedented.这样大的洪水真是十年九不遇。

4 galaxy   

n.星系；银河系；一群(杰出或著名的人物)

参考例句：

• The earth is one of the planets in the Galaxy.地球是银河系中的星球之一。
• The company has a galaxy of talent.该公司拥有一批优秀的人才。

5 astronomical   

adj.天文学的，（数字）极大的

参考例句：

• He was an expert on ancient Chinese astronomical literature.他是研究中国古代天文学文献的专家。
• Houses in the village are selling for astronomical prices.乡村的房价正在飙升。

6 craters   

n.火山口( crater的名词复数 )；弹坑等

参考例句：

• Small meteorites have left impact craters all over the planet's surface. 这个行星的表面布满了小块陨石留下的撞击坑。 来自《简明英汉词典》
• The battlefield was full of craters made by exploding shells. 战场上布满弹坑。 来自《现代英汉综合大词典》

7 Soviet   

adj.苏联的，苏维埃的；n.苏维埃

参考例句：

• Zhukov was a marshal of the former Soviet Union.朱可夫是前苏联的一位元帅。
• Germany began to attack the Soviet Union in 1941.德国在1941年开始进攻苏联。