Once there was a king and his daughter. The king asked his daughter how much she loved him. She said that she loved him as much as she loved salt. Her answer made the king very happy. Salt is simple thing, but it is very important. So the king thought his daughter cared a lot about him.
Salt has many uses. Bodies need salt. If we don't have enough, our bodies can't work properly. We put salt on icy roads to make them safe. We also use salt to produce other products, like paper and glass. But for many years, salt's most important job was to protect food. Like other living things, most bacteria(细菌) need water to live. Salt takes in plenty of water, so most bacteria can't live in a salty environment. Therefore, salt protects food and many other things. For much of humans history, this ability has made salt valuable. Every ancient culture from Egypt to China depended on salt. Even today, the hard working usefulpeople are described as "the salt of the earth".
For centuries, salt was also hard to get because its usefulness made it very expensive. Saltcould even be used like money, in fact, the word salary(薪水) comes from the word salt.
Today, salt is used more widely and it still plays an important role in our life.
①p thing or object made by a nature or persons
②d to say what something is like or give a picture of in words
Therefore, salt protects food and many other things.
a , salt protects food and many other things.
