Ten space ships constructed in orbit using 950 ferry flights to supply the building materials would make the 2-year voyage to the Red Planet.
最后一步这样实现：用950艘运载火箭运输材料，在地球轨道上建造10艘宇宙飞船，再用2年时间飞往那颗红色行星。
DESPITE regular passenger-ferry crossings, a tunnel rail link and numerous commercial flights, some people choose to traverse the English Channel under their own steam.
尽管有运送乘客的常规渡轮、海底隧道和无数商业航班，有些人还是选择用自己的力量穿越英吉利海峡。
DESPITE regular passenger-ferry crossings, a tunnel rail link and numerous commercial flights, some people choose to traverse the English Channel under their own steam.
尽管有运送乘客的常规渡轮、海底隧道和无数商业航班，有些人还是选择用自己的力量穿越英吉利海峡。
应用推荐