火星零距离 总共四讲
英字:
Mars Up Close, Part 1: Marc Kaufman | Nat Geo Live - YouTube
Mars Up Close, Part 2: John Grant | Nat Geo Live - YouTube
Mars Up Close, Part 3: Ken Edgett | Nat Geo Live - YouTube
Mars Up Close, Part 4: Pan Conrad | Nat Geo Live - YouTube
我翻译的中字: