2022届北京西城区高三英语二模D篇阅读分析和答案解析
色氨酸合成酶a蛋白质>关于高考的英语作文笔者作为天文学爱好者，偶尔喜欢仰望星空，尽管城市夜空很少月明星稀。每当有流星划过夜晚的天际，我总会想到，如果这些“天外来客”轻吻或拥抱我们的地球家园，将会有着怎样的结果。
（原文第一自然段）NASA will crash a spacecraft into an asteroid (kst小行星) to try to change its orbit, attempting to prevent humans going the same way as the dinosaurs.
首段点明NASA will crash a spacecraft into an asteroid to try to change its orbit，此举目的在于避免人类重蹈恐龙灭绝的覆辙。
（原文第二自然段）Earth is constantly being disturbed by small pieces of debris (碎片), but they usually burn up or break up long before they hit the ground. Once in a while, however, something large enough to do significant damage makes impact. About 66 million years ago, one such crash is thought to have wiped out the dinosaurs. Someday, something simil
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ar could end human beings—unless we can find a way to tackle it.
此段首先言及asteroid影响地球的常识。一类情况是small pieces of debris burn up or break up long before they hit the ground长沙平面设计；第二种情况，something large enough to do significant damage makes impact。举例说明About 66 million years ago, one such crash is thought to have wiped out the dinosaurs。恐龙灭绝的事实已为human beings敲响警钟。为了避免重蹈恐龙灭绝的覆辙，我们该如何应对？
（原文第三自然段）NASA’s Double Asteroid Redirection Test (Dart) mission is the first attempt to test if such asteroid redirection is a realistic strategy: investigating whether a spacecraft can autonomously reach a target asteroid and intentionally crash into it, as well as measuring the amount of redirection. “If it works, it would be a big deal, becau it would prove that we have the technical capability of protecting ourlves,” said Jay Tate, the director of the National Near Earth Object Information Center.
回到NASA。
Double Asteroid Redirection Test (Dart) mission便是人类第一次尝试，目的在于to test if such asteroid redirection is a realistic strategy。此处的asteroid redirectioncookies怎么读，实为第一自然段的changing its orbit。
具体步骤如下：reach a target asteroid，crash into it，measure the amount of redirection。
此举如果成功，其意义在于：it would prove that we have the technical capability of protecting ourlves，即为这将证明我们有技术能力来保护我们自身。
（原文第四自然段）The 610kg Dart spacecraft is scheduled to be launched at the target—
the Didymos system—a harmless pair of asteroids consisting of a 163-metre “moonlet” asteroid called Dimorphos that orbits a larger 780-metre asteroid called Didymos (Greek for “twin”). The plan is to crash the spacecraft into Dimorphos when the asteroid system is at its clost to Earth—about 6.8 million miles away.
实验针对目标：the Didymos system
具体撞击对象：Dimorphos, that orbits alarger 780-metre asteroid called Didymos
实验所用工具：The 610kg Dart spacecraft
所选发射位置：at its clost toEarth—about 6.8 million miles away
（原文第五自然段）About 10 days before impact, a miniaturized satellite called LiciaCube will parate from the main spacecraft, enabling images of the impact to be relayed back to Earth. Combined with obrvations from ground-bad telescopes, and a
n onboard camera that will record the final moments before the crash, the recordings will enable scientists to calculate the degree to which the impact has changed Dimorphos’s orbit. The expectation is that it will change the speed of the smaller asteroid by approximately 1% and reduce its orbit around the larger asteroid.
操作的第一步：撞击之前十几天，LiciaCube, with an onboard camera that will record the final moments before the crash, will parate from the main spacecraft。此举目的在于enabling images of the impact to be relayed back to Earth。
（原文第六自然段）Then, in November 2024, the European Space Agency’s Hera spacecraft will visit the Didymos systemand conduct a further clo-up analysis of the conquences of this snooker (斯诺克) game, recording details such as the preci makeup and internal structure of Dimorphos, and the size and shape of the hole left by D
art. Such details are vital for transforming asteroid redirection into a repeatable technique.
操作的第二步：the European Space Agency’s Hera spacecraft will visit the Didymos system and conduct a further clo-up analysis of the conquenceslay back，记录包括the preci makeup and internal structure of Dimorphos, and the size and shape of the hole left by Dart。这些细节对于transforming asteroid redirection into a repeatable technique很重要。沈阳英语
（原文第七自然段）Even then, it is impossible that any single redirection strategy would be enough. “The problem is that no two asteroids or comets are alike, and how you redirect one depends on a huge number of variables. There is no silver bullet in this game. What you need is a whole folder of different redirection methods for different types of targets,” said Tate.
借用Tate 的观点，表明it is impossible that any single redirection strategy would be enough，也即任何单个的重新定位方向策略都是不可能的。原因在于no two asteroids or comets are alike, and how you redirect one depends on a huge number of variables，没有两个同样的小行星或彗星，再有如何重定一个小行星或彗星取决于一系列变量。
（原文第八自然段）帽子英文翻译So, while this may be one small step towards planetary protection, many more are likely to be necessary to avoid destruction.
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在上一自然段基础之上，得出结论：many more are likely to be necessary to avoid destruction。即为，为避免毁灭，则需更多此类redirection strategies。
