What We Take from and Give to the
Sea
As long as we have been on earth, we have
used the sea around us. We take from the ocean, and we give to it.
We take fishes from the ocean — millions of kilograms of fish, every year,
to feed millions of people.{{U}} (46) {{/U}}We take minerals from the
ocean. One way to get salt is to place seawater in a shallow basin and leave it
until it evaporates (蒸发). (47) {{/U}}Much gold and silver drift
dissolved (溶解) in the waters of the sea, too. But the sea does not give them up
by simple evaporation. Other gifts from the sea are pearls, sponges and seaweed.
Pearls become jewelry. (48) {{/U}}Seaweed becomes food of many kinds —
even candy, and ice cream — as well as medicine. Believe it or not, fresh water
is anther gift from the sea. We cannot drink ocean water. (49)
{{/U}}But ocean water becom