托福听力练习：宇航员的工作

来源：广州花都区新东方雅思托福培训时间：2022/12/16 14:24:23

　　新东方为同学们整理了托福听力练习集锦，供考生参考学习。

　　托福听力练习：宇航员的工作

　　Most people think of astronomers as people who spend their time in cold observatories peering through telescopes every night.

　　In fact, a typical astronomer spends most of his or her time analyzing data,and may only be at the telescope a few weeks of the year.

　　Some astronomers work on purely theoretical problems and never use a telescope at all.

　　You might not know how rarely images are viewed directly through telescopes.

　　The most common way to observe the skies is to photograph them.

　　The process is very simple.

　　First, a photographic plate is coated with a light-sensitive material.

　　The plate is positioned so that the image received by the telescope is recorded on it.

　　Then the image can be developed, enlarged, and published so that many people can study it.

　　Because most astronomical objects are very remote, the light we receive from them is rather feeble.

　　But by using a telescope as a camera, long time exposures can be made.

　　In this way, objects can be photographed that are a hundred times too faint to be seen by just looking through a telescope.

尊重原创文章，转载请注明出处与链接：http://www.peixun360.com/7167/news/584862/违者必究！ 以上就是广州花都区新东方雅思托福培训 小编为您整理 托福听力练习：宇航员的工作的全部内容。