现在，距离苏珊发表里约热内卢演讲已经过去了近30年。
Now, nearly 30 years has passed since Susan made her Rio speech.
旅行者1号在1977年发射，现在距离太阳已经有175亿千米的距离了。
Launched in 1977, Voyager 1 now holds that distinction at 17.5 billion kilometers from the Sun.
发射于1977年的航海家一号如今距离地球已有170亿公里，现在应该已经接近太阳风顶层，在那里从太阳发射出的等离子太阳风已经不能抑制来自星际空间的宇宙射线。
It's now 17 billion kilometers from Earth. And it should be close to the heliopause, where the plasma flowing outward from the sun no longer holds back the interstellar winds.
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