日本高清色视频在线视频在,国产香蕉97碰碰视频碰碰看,丰满少妇av无码区,精品无码专区在线,久久无码专区免费看,四虎欧美精品永久地址99,亚洲色无码一区二区三区

您現(xiàn)在的位置: Language Tips> News English> News Digest  
   
 





 
美“鳳凰”號探測器成功降落火星
[ 2008-05-26 15:15 ]

美國宇航局25日宣布,當(dāng)?shù)貢r間25日晚, 美國“鳳凰”號火星著陸探測器成功降落在火星北極附近區(qū)域?!傍P凰號”此行的任務(wù)是尋找水和其它支持生命所需化學(xué)物質(zhì)的證據(jù)。

美“鳳凰”號探測器成功降落火星

This artist's conception shows NASA's Phoenix Mars Lander as it monitors the atmosphere overhead with a laser radar and reaches out to the soil below with the spacecraft fully deployed on the surface of Mars. [Agencies]

A three-legged NASA spacecraft was closing in on Mars yesterday for what scientists hope will be the first-ever touchdown near Mars' north pole to study whether the permafrost could have supported primitive life.

The time it takes the Phoenix Mars Lander to streak through the atmosphere and set down on the dusty surface has been dubbed "the seven minutes of terror" for good reason. More than half of the world's attempts to land on Mars have ended in failures.

"I'm a little nervous on the inside. I'm getting butterflies," Peter Smith, principal investigator from the University of Arizona, Tucson, said on the eve of the landing. "We bet the whole farm on this safe landing and we can't do our science without this safe landing."

Phoenix is preprogrammed to plummet through the Red Planet's atmosphere, and will rely on the intricately choreographed use of its heat shield, parachute and rockets to slow its descent from over 19,300 kph to a 8 kph touchdown.

In the ideal scenario, "we evolve out of this cocoon and spread our wings and we turn into this beautiful butterfly on the surface," said Ed Sedivy, program manager at Lockheed Martin Corp, which built Phoenix.

Mission controllers decided late Saturday to skip an opportunity to adjust Phoenix's flight path since the lander was well on track for its target landing site.

NASA has not had a successful soft landing in more than three decades since the twin Viking landers in 1976. The last time the space agency tried was in 1999 when the Mars Polar Lander angling for the south pole crashed after prematurely cutting off its engines.

Phoenix was built from a lander that was scrapped after the Polar Lander disaster. Engineers spent years testing Phoenix to resolve all known problems, but there are no guarantees on landing day.

Launched last summer, Phoenix has traveled 679 million km over nearly 10 months. Its arrival to the high northern latitudes will be closely watched by a trio of Mars orbiters circling overhead. If successful, it will join the twin Mars rovers, Spirit and Opportunity, which have been exploring the equatorial plains since 2004.

The $420 million mission is led by the University of Arizona and managed by JPL.

(Agencies/China Daily)

Vocabulary:

permafrost:永凍土,出現(xiàn)在整個北極地區(qū)和部分長期寒冷的地區(qū)。

parachute:降落傘

(英語點津Celene編輯)

 

 
英語點津版權(quán)說明:凡注明來源為“英語點津:XXX(署名)”的原創(chuàng)作品,除與中國日報網(wǎng)簽署英語點津內(nèi)容授權(quán)協(xié)議的網(wǎng)站外,其他任何網(wǎng)站或單位未經(jīng)允許不得非法盜鏈、轉(zhuǎn)載和使用,違者必究。如需使用,請與010-84883631聯(lián)系;凡本網(wǎng)注明“來源:XXX(非英語點津)”的作品,均轉(zhuǎn)載自其它媒體,目的在于傳播更多信息,其他媒體如需轉(zhuǎn)載,請與稿件來源方聯(lián)系,如產(chǎn)生任何問題與本網(wǎng)無關(guān);本網(wǎng)所發(fā)布的歌曲、電影片段,版權(quán)歸原作者所有,僅供學(xué)習(xí)與研究,如果侵權(quán),請?zhí)峁┌鏅?quán)證明,以便盡快刪除。
相關(guān)文章 Related Story
 
 
 
本頻道最新推薦
 
Walking in the US first lady's shoes
“準(zhǔn)確無誤”如何表達(dá)
英國新晉超女蘇珊大媽改頭換面
豬流感 swine flu
你有l(wèi)ottery mentality嗎
翻吧推薦
 
論壇熱貼
 
別亂扔垃圾。怎么譯這個亂字呀?
橘子,橙子用英文怎么區(qū)分?
看Gossip Girl學(xué)英語
端午節(jié)怎么翻譯?
母親,您在天堂還好嗎?

 

<strong id="xdwva"><div id="xdwva"></div></strong>
<label id="xdwva"></label>

<thead id="xdwva"></thead>
    <label id="xdwva"></label>

  1. 日本高清色视频在线视频在,国产香蕉97碰碰视频碰碰看,丰满少妇av无码区,精品无码专区在线,久久无码专区免费看,四虎欧美精品永久地址99,亚洲色无码一区二区三区 久久九九久精品国产日韩经典 国产国语国拍精品 啊v在线观看高清无码 视频一区二区欧美 久久精品爱爱唉爱