【英语时差8，16】NASA火星探测器登陆，科学家开怀

 New images sent back by NASA's Phoenix¹ Mars Lander during its first full day operating in the Martian northern polar region showed most of its science instruments in good health.

The one snag on the lander occurred when the protective sheath around the trench-digging robotic arm failed to unwrap all the way after touchdown and now covers the arm's elbow joint².

Deputy project scientist Deborah Bass³, of NASA's Jet Propulsion Laboratory, said scientists still planned to start the process of unstowing the arm, but it could take an extra day to fully⁴ stretch the arm.

Since landing on Mars, Phoenix has delighted scientists with the first-ever peek⁵ of the planet's unexplored northern latitudes⁶.

The terrain⁷ where Phoenix set its three legs is relatively⁸ flat with polygon-shaped patterns in the ground likely caused by the expansion and contraction⁹ of underground ice.

Phoenix is on a three-month mission to excavate¹⁰ the soil using its 8-foot-long (2.4-meter-long) robotic arm to reach the ice believed to be buried inches to a foot (up to 30 centimeters) deep.

The lander will study whether the landing site could have supported primitive¹¹ life. Among the things it will look for is whether the ice melted in Mars' history and whether the soil samples contain traces of organic compounds, one of the building blocks of life.

1 phoenix   

n.凤凰，长生(不死)鸟；引申为重生

参考例句：

• The airline rose like a phoenix from the ashes.这家航空公司又起死回生了。
• The phoenix worship of China is fetish worship not totem adoration.中国凤崇拜是灵物崇拜而非图腾崇拜。

2 joint   

adj.联合的，共同的；n.关节，接合处；v.连接，贴合

参考例句：

• I had a bad fall,which put my shoulder out of joint.我重重地摔了一跤，肩膀脫臼了。
• We wrote a letter in joint names.我们联名写了封信。

3 bass   

n.男低音(歌手)；低音乐器；低音大提琴

参考例句：

• He answered my question in a surprisingly deep bass.他用一种低得出奇的声音回答我的问题。
• The bass was to give a concert in the park.那位男低音歌唱家将在公园中举行音乐会。

4 fully   

adv.完全地，全部地，彻底地；充分地

参考例句：

• The doctor asked me to breathe in,then to breathe out fully.医生让我先吸气，然后全部呼出。
• They soon became fully integrated into the local community.他们很快就完全融入了当地人的圈子。

5 peek   

vi.偷看，窥视；n.偷偷的一看，一瞥

参考例句：

• Larry takes a peek out of the window.赖瑞往窗外偷看了一下。
• Cover your eyes and don't peek.捂上眼睛，别偷看。

6 latitudes   

纬度

参考例句：

• Latitudes are the lines that go from east to west. 纬线是从东到西的线。
• It was the brief Indian Summer of the high latitudes. 这是高纬度地方的那种短暂的晚秋。

7 terrain   

n.地面，地形，地图

参考例句：

• He had made a detailed study of the terrain.他对地形作了缜密的研究。
• He knows the terrain of this locality like the back of his hand.他对这一带的地形了如指掌。

8 relatively   

adv.比较...地，相对地

参考例句：

• The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
• The operation was relatively painless.手术相对来说不痛。

9 contraction   

n.缩略词，缩写式，害病

参考例句：

• The contraction of this muscle raises the lower arm.肌肉的收缩使前臂抬起。
• The forces of expansion are balanced by forces of contraction.扩张力和收缩力相互平衡。

10 excavate   

vt.挖掘，挖出

参考例句：

• They plan to excavate a large hole.他们计划挖个大洞。
• A new Danish expedition is again excavating the site in annual summer digs.一支新的丹麦探险队又在那个遗址上进行一年一度的夏季挖掘。

11 primitive   

adj.原始的；简单的；n.原(始)人，原始事物

参考例句：

• It is a primitive instinct to flee a place of danger.逃离危险的地方是一种原始本能。
• His book describes the march of the civilization of a primitive society.他的著作描述了一个原始社会的开化过程。