if not困难

Take a broader look at our species’ place in the universe, and it becomes clear that we have an excellent chance of surviving for tens, if not hundreds, of thousands of years.

以更宽广的视角看看我们这个物种在宇宙中的位置，就会清楚地发现，我们极有可能再生存数万年，甚至数十万年。