They always want to forget their own, but the thought has become a permanent mark.

自己又总想把它遗忘，可是在思想中成为了永远的烙印。

Our impact is so profound, most scientists believe humanity has left a permanent mark on Earth's geological record.

我们的影响如此之深刻，以至于大多科学家们相信人类在这个地球上已留下了永久的痕迹。