Topographic maps show the northern hemisphere has much lower elevations than the southern, and can be depressed by several kilometers.

图显示，火星北半球的海拔比南半球的低很，被压缩了好几千米。

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风格的简短演讲，而在他身后，我们看到了一个看发黑的月壳模型。

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

总而言之， 就理而言，美国有四个识别和定义的域。

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，因为你以随身携带图和离线图。

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.

在山脉的北侧，那里相对干燥，我们有很起伏，我们有融化的永久冻土。