September21,2050----Atapressconferencetodayitwasannounc...
問題詳情：September21,2050----AtapressconferencetodayitwasannouncedthatthefirsttouristheadingforMarswillbethe38-year-oldUSbusinessmanPatrickClifford.Hewillleavetheearthinthe launchingwindowofJune2052an...