6.High School English Listening

Well, we've all been hearing about ongoing Mars exploration, and how water probably used to be abundant there. And a water spewing volcano was recently discovered on a small moon orbiting Saturn. Water is one sign that life may exist or have existed at some point.
Sugar
Astronomers have discovered sugar molecules floating in gas surrounding a young star about 400 million light years away. Not sugar as in the stuff in those little packets, mind you. We're talking about carbohydrates simple molecules made of carbon, hydrogen, and oxygen which are the simplest forms of sugar.
But the simple sugars that the astronomers detected, called glycoaldehydes, are thought to be one of the building blocks of life.
How Do These Simple Sugars Form In Space?
Scientists suspect that they form on ice covered dust grains in interstellar clouds. The really exciting thing is that discovering these molecules near a sun like star means that the basic building blocks of life may be present around new stars even before planets form.
Again, this doesn't prove anything, but it's one more clue about how life might have begun on Earth–and how and why it might exist elsewhere in the universe.
译文：
嗯，我们都听说了正在进行的火星探索，以及那里可能曾经有大量的水。最近在围绕土星运行的一颗小卫星上发现了一座喷水的火山。水是生命可能存在的一个迹象，或者说在某些时候曾经存在过。
糖
天文学家发现糖分子漂浮在大约4亿光年外一颗年轻恒星周围的气体中。请注意，不是指那些小包装中的糖。我们谈论的是碳水化合物，由碳、氢和氧组成的简单分子，是糖的最简单形式。
但是天文学家检测到的简单糖类，称为糖醛类，被认为是生命的构成要素之一。
这些简单的糖类是如何在太空中形成的？
科学家们怀疑它们是在星际云中被冰覆盖的尘粒上形成的。真正令人兴奋的是，在类似太阳的恒星附近发现这些分子意味着，甚至在行星形成之前，生命的基本构件就可能存在于新恒星周围。
同样，这并不能证明什么，但它是关于生命如何在地球上开始的又一条线索，以及它如何和为什么可能存在于宇宙的其他地方。
重点词汇：
used to be 过去是
at some point 在某些时候
light years 光年(指光在一年中走过的距离：9.4607 × 10¹²公里) ; 很长时间 ; 很久 ; light year的复数
mind you 请注意
made of 制成 ; “make certain”的变体
be one of 在数
building blocks 积木 ; 塑料积木 ; 组成部分 ; 构成要素