Some background on the second query , the one about extraterrestrials .

在此先就有关外星人的第二个问题提供一些背景知识。

In their report , would contact with extraterrestrials benefit or harm humanity ?

在他们的报告里，与外星人接触是利还是弊呢？

The extraterrestrials may be too different from us to communicate with usefully .

也许是外星人与我们太不一样了而不能较好的沟通。

The most unappealing outcomes would arise if extraterrestrials caused harm to humanity , even if by accident .

如果外星人对人类使坏，即便是偶然地，最不理想的结果可能会出现。

The space saga follows the terran story line as the terrans fight off attacks from the extraterrestrials trying to take over .

这部太空史诗遵循人族的故事线索，第一部中人族击退了外星人发起的试图控制人类的进攻。