英語學(xué)習(xí)：特殊數(shù)字的表示法

　　(四)小數(shù)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

　　小數(shù)作定語時較多

　　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)百分數(shù)的表示法

　　百分數(shù)由per cent 表示，常常和by連用，作狀語也可單獨作狀語

　　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.

　　有時用作定語 賓語等

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

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

　　(六)倍數(shù)的表示法

　　一倍用once，兩倍用 twice，兩倍以上用基數(shù)詞＋times。如：5倍five times。

　　(七)一些數(shù)學(xué)公式的讀法

　　3+8=11 Three plus eight is eleven.

　　9-7=2 Nine minus seven is two.

　　ab a is more than b.

　　a

　　(八)約數(shù)的表示法

　�、� “多于”用more than 或over

　　This room can hold more than (=over) 500 people.這間屋子能容納500多人。

　　⑵ “少于”用less than

　　There are less than thirty balls in the basket.籃子里不到三十個球。

　　⑶ “或……以上”用or more

　　The music hall can hold 7000 people or more.音樂廳能容納7000人或7000人以上。

　　⑷ “或……以下”用or less

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

　　⑸ “大約”用about, around, nearly等

　　The box weights about 50 pounds.這個箱子重約50磅。

　�、� “左右”用or so

　　In the past ten years or so , they have changed a lot.在過去的十年左右的時間里，他們改變了許多。