How was the Moon’s crust formed? 科学家提出月球外壳形成的新观点

How was the Moon’s crust formed? 科学家提出月球外壳形成的新观点 Play audio file 月球是由许多层状结构组成的，包括它厚厚的外壳，但你有没有想过月球最外层的 “月壳” 是怎样形成的？人们以前认为月球的岩石外层是由其表面深处的岩浆或熔融岩石形成的。 The scientists re-analysed a sample collected by NASA astronauts during the 1972 Apollo mission. What they found suggests large portions of the crust were formed at temperatures in excess of 2,300 degrees Celsius, which they say, could have been achieved by the melting of the outer layer. 这些温度高得惊人，这表明一次极大的撞击不仅摧毁了月球表面，同时也促使其表面的形成。 The idea overturns previous theories that colliding asteroids and comets were a purely destructive process with the lunar crust being created by magmas rising from the interior. 这个观点推翻了之前的理论，即小行星和彗星的碰撞纯粹是一种破坏性的过程，以为月壳是由月球内部上升的岩浆形成的。 词汇 sample 样本 crust 外壳 outer layer 外层 terrific 极大的，剧烈的 lunar 月球的，月亮的 surface 表面 colliding 碰撞，撞击 asteroids 小行星 comets 彗星 interior 内部 阅读理解：请在读完上文后，回答下列问题。 1.