And although we know that the land animals I'm going to talk about are just the scum of the Earth on the land -- the little bits of land floating around -- but they are important to us because they're sort of in our scale of experience from millimeters to meters.
下面我要讲到的陆地动物 虽然只是在漫长的进化历程中昙花一现， 对我们来说，却有着深远的意义。 因为它们是我们经验逐步累积中的一部分。