数字和倍数的表示

than X-ray waves.
The production of integrated circuits has been
increased to three times as compared with last year.
数字的表示
约定俗成的规则 :
句首不用阿拉伯数字，一般用英语的单词，

例句
The gain of the voltage follower with the feedback loop closed is unity. The result indicated that actual error probabilities were of the order of 1 percent. The microwave communication channel has a very large bandwidth and will accommodate thousands of telephone conversations or dozens of television channels at once.
How to translate these sentences?
if f(t) is even and we multiply it by the
odd function. Evaluation of any one term involves multiplying each signal sample value by a factor of the term cosT.
倍数的减少
译为：减少到1/n[或：减少(n-1)/n]。 有减少意义的动词 +n times
n times as much as by n times by a factor of n
不定冠词+有减少意义的名词+by a factor of n “… a n times (n-fold) reduction”
句末要尽量避免用阿拉伯数字；
遇到分数，可用带连字符号的单词表示。
不确定数字的表示
大约、左右，常用about、some、approximately、 of the order of、more or less、or so等词。 多于，常用over、above，more than、in excess of等词。 少于，常用less than、under、below、close to 等词。 以复数形式表示，如tens、dozens、scores、 hundreds 、 thousands of 、 thousands upon thousands of 等。
倍数的增加（2）
increase to n times
increase n times /n-fold increase by n times
increase by a factor of n
翻译为：增加到n倍，即增加n-1倍
increase也常用其他表示有增加意义的词代替， 如raise、grow、go、step up、multiply等。
百分数增减的表示法与译法
（4）％＋ 比较级 ＋than (表示净增减的数 量) [ 例 ] Retail sales are expected to be nine percent higher than last year.
（5）a + % + increase (表示净增数) [例] There is a 20% increase of steel as compared with last year.
补充几个数量的表达方法

A hundred and one = a lot of
A long hundred A long hour A score A decade


At nine hundred hours
Twenty odd = twenty and odd
Fundamentals and New Concepts for Electronics＆Telecommunications
数量、倍数的表示
How to translate these sentencபைடு நூலகம்s?
Wire A is twice as long as wire B. Light waves are 2,000 to 10,000 times longer
once表示一倍，
twice或double表示两倍，
thrice、treble表示三倍。 Quadruple表示四倍。 n times/n-fold 例如： The efficiency of the machines has been more than tr ebled or quadrupled． 这些机器的效率已提高了2倍或3倍多。
倍数的增加（3）
“……a +n times(n-fold)+有增加意义的名词……”
译为“增加了n-1倍” There is a two times increase of our institute’s students as compared with last year.
倍数的增加（4）特殊用法！
与汉语不同的是：英语在表述或比较倍
数时，无论使用什么句型（除了不含倍
数词的again句型之外）都包括基础倍
数在内，因此都不是净增或净减n倍，
而是净增或净减n-1倍。
倍数的减少
“系动词+n times +比较级+than”
“a n times less than……”结构 “A is n times as small (light, slow…) as
A is as much (large, long …) again as B. A比B多（大，长…）1倍。 （即两倍）
The peak power is again as great as the
carrier power.
A比B多（大，长…）1半。（即一倍半）
A is half as much (large, long …) again as B
例句
The length of laser tube was reduced ten times. The weight of the new typewriter is reduced three
times as light as that of the old one.
The bandwidth was reduced by two times.
B” R1 is 3 times less than R2. The emitter series resistance is a four times less than the collector one. The hydrogen atom is near1y l6 times as light as the oxygen atom.
（1）表示增减意义的动词＋％ [例] The output value has increased 35%.
（2）表示增减意义的动词＋by＋％ [例] The prime cost decreased by 60%. （3）表示减少意义的动词＋to+% (表示减少后剩余 的数量) [例] By using this new-process the loss of metal was reduced to 20%.
倍数的增加(1)
A is n times as +形容词/副词+as B A is n times +比较级+than B A is n times +the 名词 of B
翻译为：A是B的n倍，即比B大（长、多……）n-1倍 Wire A is twice as long as wire B. Light waves are 2,000 to 10,000 times longer than X-ray waves. This high voltage DC converter is 9 times the weigh of that.
twice.
The drain voltage has been increased by a factor of
four.
Since the voltage is raised one hundred-fold, the
current drops by the same proportion to onehundredth.

The production of integrated circuits has been increased to three times as compared with last year.
The sensibility of this type of radio was increased by
某些表示数量的词或词组
修饰可数名词 few（几乎没有） not many（不多） a few（少数几个） a great many（很多） 修饰不可数名词 little not much a little a great deal some（一些） a lot of plenty of 修饰可数名词或 部可数名词
The equipment reduced the error probability by a
factor of 5.
The principal advantage of the electronic products is
a two-fold reduction in weight.
百分数增减的表示法与译法