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第70页

信息发布者：

passengers

compare

gravity

took

reminds

will move

has polluted

are travelling

People would have to wear boots that are specially designed to prevent themselves

from floating off into space.

Compared with life on the Earth, life on Mars would be better in some ways.

People might live in houses with huge comfortable rooms.

Robots would do most of the work so that people could have more time to relax.

There would probably be no schools on Mars. Every student would have a

computer at home connected to an interplanetary network.