The human body is truly amazing. It allows us to sense the world around us, to do work and have fun, and to move from place to place. In fact, the human body does its work so well that most people don’t think about it very much_until they get sick.
Hoffmann worked for Bayer, a German company. He showed his new drug to his manager, who tested the drug and found that it worked well. Bayer decided to make the drug. They called it aspirin and put the Bayer name on every pill.
Finally，we know that language changes. It is natural and normal for language to change ； the only languages which do not change are the dead ones. This is easy to understand if we look backward in time. Change goes on in all aspects of language. Grammatical features change as dopeech sounds，and changes in vocabulary are sometimes very extensive and may occur very rapidly. Vocabulary is the least stable part of any language.