deeper //

Now utopia has grown unfashionable, as we have gained a deeper appreciation of the range of threats facing us, from asteroid strike to epidemic flu and to climate change.

如今，乌托邦已不再流行，因为我们对所面临的各种威胁有了更深刻的认识，从小行星撞击到流感疫情，再到气候变化。

But there is a deeper conceptual problem, too.

但还有一个更深层次的概念性问题。