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信息发布者：
dried food 
power pack 
sleeping bag 
planet
passenger 
compare 
polluted
pollute
rapid
rapidly
increase
increase
uncomfortable
comfortable
uncomfortably
comfortably
tasty
taste
specially
special
think about 
travel into space 
me neither 
get to my food 
as well as 
live on Mars 
by the year 2100
become more and more crowded 
the rapid increase in population 
start all over again
large numbers of passengers 
at the speed of light 
the journey to Mars 
in the form of pills 
be designed to do 
compare to/with 
in some ways 
prevent themselves
from floating off into space 
connect to 
I've never 
thought about travelling into space. 
How do you like life here? 
It is hoped that people could start all over 
again and build a better world.
The gravity on Mars is only about
three- eighths of that on the Earth.
Compared with life on the Earth, life on Mars
would be better.in some ways.
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