萨根先生还帮助海盗一号和海盗二号火星探测器选择在火星登陆的地点，这是人类火星探测器第一次成功在火星上着陆。
Mister Sagan helped choose the landing area for Viking One and Viking Two, the first space vehicles to successfully land on Mars.
萨根先生还帮助海盗一号和海盗二号火星探测器选择在火星登陆的地点，这是人类火星探测器第一次成功在火星上着陆。
Mister Sagan helped choose the landing area for Viking One and Viking Two, the first space vehicles to successfully land on Mars.
应用推荐