He delivers a brief TED-style talk, while behind him we see a topographic model of what looks like blackened lunar crust.

他做了一个TED风格简短演讲，而在他身后，我们看到了一个看似发黑月壳地形模型。

Topographic and ecological barriers, much more pronounced on some continents than on others, were locally important obstacles to diffusion.

地形和生态障碍在某些大陆上比在其他大陆上更为明显，是当地传播重要障碍。

In sum, as far as geography is concerned, there are four recognizable and definable topographic regions in the United States.

总而言之， 就地理而言，美国有四个可识别和可定义地形区域。

Get lost for a little while, but not like lost, lost, because you can take topographic and offline maps with you.

迷路一会儿， 但不像迷路、迷路，因为你可以随身携带地形图和离线地图。

Here on the north side of the mountains, where it's relatively dry, and we have a lot of topographic relief, we have thawing permafrost.

在山脉，那里相对干燥，我们有很多地形起伏，我们有融化永久冻土。

Sadly, it was already in darkness by the time New Horizons was able to capture it, so the images  aren't quite as clear as those of Wright Mons, but you can see it here in this colourized topographic  map.

可悲是， 当新视野号能够捕捉到它时， 它已经处于黑暗之中，所以图像并不像莱特蒙斯图像那样清晰，但你可以在这张彩色地形图中看到它。