32.我们的未来取决于它

our future depends on it

31.没有任何东西像一滴水一样宝贵

nothing is as precious as a drop of rain

30.给海洋中的生态系统增加能量

add energy to the marine ecosystems

29.通过吸收和释放热量而保持稳定

keep steady by absorbing and giving off heat

28.对温度的巨变和突变很敏感be sensitive

to large and sudden changes in temperature

27.释放出大量的热　　 give off a lot of heat

26.把温度提高1℃ raise the temperature by one degree centigrade

25.能量　　　 the amount of energy

24.利用水的密度

take advantage of the density of water

23.每立米用公斤来衡量

be measured in kilograms per cubic metre