文档介绍:1) recreation
2) stabilize
3) At first thought
4) species
5) Manmade
6) simplify
7) has been exposed
8) mobile
9) convenience
10) mind you
11) varies
12) occupation
 
1) in the open
2) virtually
3) is adjusted
4) on the stroke
5) Artificial
6) entails
7) someday
8) endeavors
9) To a certain extent
10) deprived of/deprived them of the
11) intense
12) geared
 
1) take up
2) Deprived of
3) derives from
4) get away from
5) protect     from
6) withdrew from
7) be geared to
8) turn    over
 
1) Living underground, man would not have to adjust to the weather because the temperature there remains the same and there is no rain, sleet or snow.
2) Though the attitude towards space travel varies from person to person, everyone is interested in learning about outer space.
3) Though he described the place carefully, I could not visualize it because it was so different from anything I'd known.
4) Steve is just one of those who derive pleasure from helping others.
5) A puppet regime was established in the 1930s during the Japanese occupation of Northeast China.
 
1) the science which studies the use of water to produce power
2) any of several pounds of hydrogen and carbon
3) electricity produced from water power
4) a flat-bottomed motor-boat which can move very fast over the surface of water
5) the treatment of diseases by the use of water, usu. wat