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托福听力训练002——天文 · 金星

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原文:

Are the volcanoes on Venus still active? Well, that's an interesting question. There is still some discussion on that point. But here's what we do now. First, the level of sulfur dioxide gas above Venus's clouds shows large and very frequent fluctuations.

It's quite possible that these fluctuations, the huge increase and decrease of sulfur dioxide, happening again and again. It's quite possible that this is due to volcanic eruptions because volcanic eruptions often emit gases. If that's the case, volcanism could very well be the root cause of Venus's thick cloud cover.

And also we have observed bursts of radio energy from the planet's surface. These bursts are similar to what we see when volcanoes erupt on Earth. So this too suggests ongoing volcanic activity. But although this is intriguing evidence, no one's actually observed a Venus volcano erupting yet, so we can't be positive.


解析:

学生质疑金星上面的火山是否还活跃?

教授给出的回答是,他们检测到金星上的二氧化硫气体。二氧化硫气体正常会出现在火山喷发活跃的地区,这和地球上是一样的,所以如果假定金星上面的火山还是活跃的话,这就能解释金星表面覆盖的厚厚的云层。

同时,他们还检测到radio energy from the planet's surface,这进一步论证了金星上火山还是活跃的观点。

但是,最后教授提出,并没有人实际观测到金星上火山是活跃的,所以我们不能肯定这些假说。

 

生词:

  • sulfur dioxide 二氧化硫
  • fluctuations 起伏
  • volcanic eruptions 火山喷发
  • emit gases 释放气体
  • root cause 根本原因
  • radio energy 无线电能量
  • intriguing evidence 有趣的证据
  • can't be positive 不能肯定


主目录:https://www.v2know.com/MainPage/Category/TOEFL

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This article was last edited at 2021-04-20 09:07:56

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