北师大版高中英语模块7--Unit 20 workshop3
教程:北师大版高中英语模块7(选修)  浏览:443  
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    [00:01.07]How long have we been observing Mars?

    [00:04.11]Well, towards the end of the nineteenth century

    [00:07.11]improved telescopes meant that astronomers

    [00:09.39]could start to observe the surface

    [00:11.27]of the planet.

    [00:12.86]An Italian astronomer saw channels

    [00:15.43]on the surface of the planet

    [00:16.95]and this caused great interest.

    [00:19.03]Unfortunately,6a translation made some English

    [00:22.24]mistakes and people thought that "canals"

    [00:24.89]had been found on the surface.

    [00:28.10]This made people think about the possibility

    [00:29.75]of life on Mars and "Martians"

    [00:32.78]entered science fiction for the first time.

    [00:35.71]In H G Wells' famous book The War

    [00:38.74]of the Worlds of 1898,

    [00:41.28]Martians are highly developed creatures

    [00:43.55]with large heads that try to take

    [00:45.60]over planet Earth.

    [00:47.75]Right,now let's look at actual exploration

    [00:50.69]of the planet.The first probe to get near Mars

    [00:53.92]was Mariner 4,which flew past the planet

    [00:57.21]in 1964 and took photos of it.

    [00:59.96]After that,there were several failures,

    [01:02.16]with probes crashing on landing

    [01:04.37]or failing to get into orbit.

    [01:07.04]The big breakthrough came with Pathfinder,

    [01:10.23]which successfully landed on July 4,1997

    [01:13.43]and sent back wonderful photos

    [01:15.55]of the surface of Mars.

    [01:17.54]These photos and the six-wheel vehicle

    [01:20.13]which explored the area

    [01:21.44]increased public interest.

    [01:22.23]

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