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谢谢change呀~~~
3'18
2'50
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3'56
1'46
6-11'23
The gist of this passage is the controversy about the latest Mars plan initated by a private team led by Tito.
At first, the author mentions the moon-landing project to compare with the Mars-landing, which the government is unwilling and disinclined to handle and juggle but the private groups are interested in and reach out to. Then, the author specifically describes the promising two Mars travel plans and also points out the justification and ground for government not to take that action actively.
Moreover, the author introduces some possible trouble and difficulties concerning the private Mars program, such as the feasibility of techonolgy, which includes the heat protection on the craft, the much longer time span of travel, and the exceedingly high cost along with its source.
Finally, the author considers this Mars travel plan, to some extent, valuable and useful.
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