When we see a long-period comet gracing our skies, could we be seeing an object from an alien solar system?

当我们看到一颗长周期彗星掠过我们的天空时，我们能看到来自外星太阳系的物体吗？

Is there any reason to think alien communication systems would share the two key design features of human language, words and grammar?

有什么理由认为外星通讯系统会共享人类语言中词汇和语法这两个关键的设计特征？

We are still alert to other quite alien systems of reality that flash on the very outskirts of consciousness as we know it.

我们仍然对其他非常陌生的现实系统保持警惕，这些系统在我们所知的意识边缘闪现。