PartⅤ English Number and Formula Representation
英文数字、算式表示法
1.小数表示法
(1)小数用基数词来表示,以小数点为界,小数点左首的数字为一个单位,表示整数,数字合起来读;小数点右首的数字为一个单位,表示小数,数字分开来读;小数点读作point,o读作zero或o[əʊ],整数部分为零时,可以省略不读。
0.4 zero point four或point four零点四。
10.23 ten point two three十点二三。
25.67 twenty-five point six seven二十五点六七。
1.03 one point o three一点零三。
(2)当小数后面接名词时,如果数字值大于1时,名词用复数,数字值小于1时,名词用单数。
1.03 meters一点零三米。
0.49 ton零点四九吨。
1.5 tons一点五吨。
2.分数表示法
(1)基数词作分子,序数词作分母,除了分子是“1”以外,其他情况下序数词都要用复数形式。
3/4 three fourths或three quarters
1/3 one third或a third
24/25 twenty-four twenty-fifths
3 three and one fourth或three and one quarter
1/2 a half
1/4 one quarter或a quarter
1one and a half
1 one and a quarter
(2)当分数后面接名词时,如果分数表示的值大于1,名词用复数;小于1,名词用单数。
1 hours一个半小时(读作one and a half hours)
2 meters二又四分之三米(读作two and three-fourths meters)
4/5 meter五分之四米
5/6 inch六分之五英寸
(3)百分数表示法
百分数用“基数词+percent”表示。
50% fifty percent百分之五十
3% three percent百分之三
0.12% zero point one two percent百分之零点一二
percent的前半部per表示“每一”,后半部分cent表示“百”,所以百分之几中percent不用复数形式。
4.加、减、乘、除和乘方表示法
(1)“加”用plus,and或add表示:“等于”用is,make,equal等词表示。
2+3=?可表示为:How much is two plus three?
2+3=5 Two plus three is five.
Two and three is equal to five.
Two and three makes five.
Two added to three equals five.
If we add two to/and three,we get five.
二加三等于五。
(2)“减”用minus或take from表示。
10-6=?可表示为:How much is ten minus six?
10-6=4 Ten minus six is four.
Take six from ten and the remainder is four.
Six(taken)from ten is four.
十减去六等于四。
(3)“乘”用time(动词)或multiply表示。
3×4=?可表示为:How much is three times four?
3×4=12 Three times four is twelve.
Multiply three by four,we get twelve.
Three multiplied by four makes twelve.
三乘以四等于十二。
(4)“除”用divide的过去分词形式divided表示。
16÷4=?可表示为:How much is sixteen divided by four?
16÷4=4 Sixteen divided by four is four.
Sixteen divided by four equals/gives/makes four.
十六除以四等于四。
(5)表示“n次方”的说法:指数用序数词,底数用基数词。
10的7次方:the seventh power of ten(ten to the seventh power)
6的10次方:the tenth power of six(six to the tenth power)
5.数量表示法
表示长、宽、高、面积等,用“基数词+单位词(meter,foot,inch,kilogram等)+形容词(long,wide,high等)”表示,或者用“基数词+单位词+in+名词(length,width,height,weight等)”表示。
two meters long或two meters in length 2米长。
three feet high或three feet in height 3英尺高。
four inches wide或four inches in width 4英寸宽。
This box is 2 kilograms in weight.这个盒子有两千克重。
The city wall of Xi'an is 12 meters wide and 12 meters high.西安城墙是12米宽,12米高。