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(单词翻译:双击或拖选)
(woman) Most people think of astronomers2 as people who spend their time in cold observatories3 peering through telescopes every night. In fact, a typical astronomer1 spends most of his or her time analyzing4 data and may only be at the telescope a few weeks of the year. Some astronomers work on purely5 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 astronomical6 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.
1 astronomer | |
n.天文学家 | |
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2 astronomers | |
n.天文学者,天文学家( astronomer的名词复数 ) | |
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3 observatories | |
n.天文台,气象台( observatory的名词复数 ) | |
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4 analyzing | |
v.分析;分析( analyze的现在分词 );分解;解释;对…进行心理分析n.分析 | |
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5 purely | |
adv.纯粹地,完全地 | |
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6 astronomical | |
adj.天文学的,(数字)极大的 | |
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