SSS 2008-02-27_在线英语听力室_免费在线英语听力学习网站

(单词翻译:双击或拖选)

This is Scientific American’s 60-Second Science. I am Adam Hinterthuer. Got a minute?

Earlier this month, NASA announced that an MIT Physics professor will lead a team of scientists on a new mission. The objective: build a giant radio telescope on the far side of the moon. You see, long long ago, before there even was a galaxy¹ far far away, the universe settled into a cosmic Dark Age. It was a billion year period following the Big Bang and it produced the structure of space as we know it. Astronomers² have long hoped to detect the faint low-frequency radio emissions³ generated from this time so they could learn more. But thanks to the interference from the ionosphere, not to mention tons of radio and TV signals, earth is a lousy place to hear. Luckily the moon rotates so that one side always faces out into space, making it free and clear of noise pollution. The MIT team will use automated⁴ vehicles to arrange hundreds of antennas⁵ across 2 square kilometers of the moon’s quiet side. From this perch⁶, they hope to hear the waves produced from the birth of the universe and get in tune⁷ with how it all came to be.

Thanks for the minute, for Scientific American’s 60-Second Science. I am Adam Hinterthuer.

点击

收听单词发音

1 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。

2 astronomers
n.天文学者，天文学家( astronomer的名词复数 )
参考例句：
Astronomers can accurately foretell the date,time,and length of future eclipses. 天文学家能精确地预告未来日食月食的日期、时刻和时长。来自《简明英汉词典》 Astronomers used to ask why only Saturn has rings. 天文学家们过去一直感到奇怪，为什么只有土星有光环。来自《简明英汉词典》

3 emissions
排放物( emission的名词复数 )；散发物（尤指气体）
参考例句：
Most scientists accept that climate change is linked to carbon emissions. 大多数科学家都相信气候变化与排放的含碳气体有关。 Dangerous emissions radiate from plutonium. 危险的辐射物从钚放散出来。

4 automated
a.自动化的
参考例句：
The entire manufacturing process has been automated. 整个生产过程已自动化。 Automated Highway System (AHS) is recently regarded as one subsystem of Intelligent Transport System (ITS). 近年来自动公路系统(Automated Highway System,AHS)，作为智能运输系统的子系统之一越来越受到重视。

5 antennas
[生] 触角，触须（antenna的复数形式）
参考例句：
Marconi tied several antennas to kites. 马可尼在风筝上系了几根天线。来自超越目标英语第3册 Radio astronomy today is armed with the largest antennas in the world. 射电天文学拥有世界上最大的天线。

6 perch
n.栖木，高位，杆；v.栖息，就位，位于
参考例句：
The bird took its perch.鸟停歇在栖木上。 Little birds perch themselves on the branches.小鸟儿栖歇在树枝上。

7 tune
n.调子；和谐，协调；v.调音，调节，调整
参考例句：
He'd written a tune,and played it to us on the piano.他写了一段曲子，并在钢琴上弹给我们听。 The boy beat out a tune on a tin can.那男孩在易拉罐上敲出一首曲子。