重要詞匯：Lecture, tutorial, seminar, presentation etc.
好运快三开户Instruction: Dr. Linda Graycar who is from the City Institute for the Blind is talking about the system of writing for the blind known as Braille.
好运快三开户1. What can the combined dots represent?
好运快三开户A both letters and words
好运快三开户B only individual words
C only letters of the alphabet
2. What is unusual about the way Braille is written?
好运快三开户A It can only be written using a machine.
B The texts have to be read backwards.
C Handwritten Braille is created in reverse.
Dr. Graycar: Well, it's a system of touch reading which uses an arrangement of raised dots called a cell. Braille numbered the dot positions 1-2-3 downward on the left and 4-5-6 downward on the right, The letters of the alphabet are then formed by using different combinations of these dots.
好运快三开户Student: So is the writing system based on the alphabet with each word being individually spelt out?
Dr. Graycar: Well ... it's not quite that simple, I'm afraid! For instance, the first 10 letters of the alphabet are Formed using dots 1, 2, 4 and 5. But Braille also has its own short forms for common words. For example, 'b' for the word 'but' and 'h' for 'have' – there are many other contractions like this.
Student: Can it be written by hand or do you need a machine to produce Braille?
Dr. Graycar: Well, you can write it by hand on to paper with a device called a slate and stylus but the trick is that you have to write backwards . . . e.g. from right to left so that then when you turn your sheet over, the dots face upwards and can be read like English from left to right.