For many people today, reading is no longer relaxation. To keep up their work they must read letters, reports, trade publications, not to mention newspapers and magazines: a never-ending flood of words. In a job, the ability to read and understand can mean the difference between success and failure. Yet the unfortunate fact is that most of us are readers. Most of us bad reading habits at an early age, and never get over them. The main reason in the fact that words have little meaning they are put together into phrases, sentences and paragraphs., however, the untrained reader does not read groups of words. He reads one word at a time and often goes back to words or passages. The tendency to look back over you have just read is a common bad habit in reading. Another habit which down the speed of reading is sounding each word as reads. To overcome these bad habits, some reading clinics use a machine called an accelerator(加速器), which moves a bar the page at a predetermined speed. The bar is set at a slightly faster rate the reader finds comfortable, in order to train him. The accelerator forces the reader to read fast, word-by-word reading impossible. At first it is difficult to understand. But you have learned to read ideas and concepts, you will not only read faster,your comprehension will improve. Many people have found their reading skill quickly after some training. Charlce Au, a business manager, for example, his reading rate was 172 words a minute the training and now it is an excellent 1,378 words a minute. He is happy that now he can a lot more reading materials in a short period of time.