英语学习：特殊数字的表示法

　　(四)小数的表示法

　　7.8 seven point eight

　　0.4-zero point four

　　0.125- zero point one two five

　　603.09-six hundred and three point oh nine

　　小数作定语时较多

　　Its total industrial output value was up 5.6 times in these years.

　　Our grain output is now 2.4 times that of 1970.

　　(五)百分数的表示法

　　百分数由per cent 表示，常常和by连用，作状语也可单独作状语

　　Its total output value increased by 11.5 per cent over the previous year.

　　The output of cars in the U. S. last year was 24 per cent less than in 1973.

　　有时用作定语 宾语等

　　The loss of metal has been reduced to less than 20%.

　　The March figure for output value registered a 37% increase over February.

　　(六)倍数的表示法

　　一倍用once，两倍用 twice，两倍以上用基数词＋times。如：5倍five times。

　　(七)一些数学公式的读法

　　3+8=11 Three plus eight is eleven.

　　9-7=2 Nine minus seven is two.

　　ab a is more than b.

　　a

　　(八)约数的表示法

　　⑴ “多于”用more than 或over

　　This room can hold more than (=over) 500 people.这间屋子能容纳500多人。

　　⑵ “少于”用less than

　　There are less than thirty balls in the basket.篮子里不到三十个球。

　　⑶ “或……以上”用or more

　　The music hall can hold 7000 people or more.音乐厅能容纳7000人或7000人以上。

　　⑷ “或……以下”用or less

　　The house can hold 50 people or less. 这座房子可容纳50人或50人以下。

　　⑸ “大约”用about, around, nearly等

　　The box weights about 50 pounds.这个箱子重约50磅。

　　⑹ “左右”用or so

　　In the past ten years or so , they have changed a lot.在过去的十年左右的时间里，他们改变了许多。