Sym is Way to Get Fresh Water

Right in the middle of the town are some long ponds(池子). They are only about half a foot deep. The men of Symi dug out the earth to make the ponds.Over each pond there is a low cover. It is made of glass that you can see through.At night, sea water is taken into the ponds. The next day, the hot sun shines through the covers. The sun light turns the water into vapour(蒸汽) and the vapour goes up from the ponds. The salt is left behind.A s itgoes, the vapour becom es m ist. O n the inside o…