月球是由許多層狀結(jié)構(gòu)組成的，包括它厚厚的外殼，但你有沒有想過月球最外層的 “月殼” 是怎樣形成的？人們以前認(rèn)為月球的巖石外層是由其表面深處的巖漿或熔融巖石形成的。

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. 

科學(xué)家們重新分析了美國宇航局宇航員在1972年阿波羅登月任務(wù)期間收集的月球外殼樣本。他們的發(fā)現(xiàn)表明，月殼的大部分是在超過2300攝氏度的溫度下形成的，他們說，這可能是由于外層的融化造成的。 

These temperatures are incredibly high and suggest a terrific impact helped not only to destroy the lunar surface, but to build it.

這些溫度高得驚人，這表明一次極大的撞擊不僅摧毀了月球表面，同時(shí)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.

這個(gè)觀點(diǎn)推翻了之前的理論，即小行星和彗星的碰撞純粹是一種破壞性的過程，以為月殼是由月球內(nèi)部上升的巖漿形成的。

詞匯

sample 樣本
crust 外殼
outer layer 外層
terrific 極大的，劇烈的
lunar 月球的，月亮的
surface 表面
colliding 碰撞，撞擊
asteroids 小行星
comets 彗星
interior 內(nèi)部

閱讀理解：請?jiān)谧x完上文后，回答下列問題。

1. True or false? The Moon’s magmas come from its outer layer.

2. Which sample did the scientists re-analyse?

3. According to the finding, how hot were most of the crust when they were formed?

4. What were the previous theories on how Moon’s crust was formed?

答案

1. True or false? The Moon’s magmas come from its outer layer.
False. They are from the interior of the Moon.

2. Which sample did the scientists re-analyse?
The scientists re-analysed a sample collected by NASA astronauts during the 1972 Apollo mission.

3. According to the finding, how hot were most of the crust when they were formed?
Large portions of the crust were formed at more than 2,300 degrees Celsius, according to the finding.

4. What were the previous theories on how Moon’s crust was formed?
Previous theories said that colliding asteroids and comets were a purely destructive process.