Do you know how to get fresh water in an island? There is a new way of getting fresh water. First people make some long ponds. They are about half a metre deep. Then they put a cover(盖)over each pond. The cover is made of glass, and you can see through it.
At night, people pour sea water into the ponds. The next day, the hot sun shines through the covers. The sunlight runs the water into steam(蒸汽). It goes up from the ponds. On the inside of each cover, the little drops of steam run together to make big drops. People then collect these big drops through a special pipe. Then the ponds are ready for the next day's work.
As we know, the covers and other parts of the ponds cost very little. Sea water and the sun cost nothing. So this new way of getting fresh water seems wonderful.
a. Pour sea water into the ponds. b. Collect big drops of steam.
c. Make some long ponds. d. The hot sun shines through the covers.
e. Put a cover over each pond. f. The sea water turns into steam.