时间:2018-12-18 作者:英语课 分类:大学四六级阅读


英语课

   数词


  表示数目多少或顺序多少的词叫数词,数词分为基数词和序数词。表示数目多少的数词叫基数词;表示顺序的数词叫序数词。
  一、基数词
  1)基数词写法和读法: 345 three hundred and forty-five;
  2)基数词一般是单数形式,但下列情况,常用复数:
  a. 与of 短语连用,表示概数,不能与具体数目连 用,如scores of people 指许多人;
  b. 在一些表示"一排"或"一组"的词组里;
  如:They arrived in twos and threes. 他们三三两两的到达了。
  c. 表示"几十岁";考试大,考试伴你同行
  d. 表示"年代",用 in +the +数词复数;
  e. 在乘法运算的一种表示法里,如:3 x 5 = 15 Three fives is (are) fifteen.
  二、序数词
  序数词的缩写形式: first---1st second---2nd thirty-first---31st
  三、 数词的用法
  1)倍数表示法
  a. 主语+谓语+倍数(或分数)+ as + adj. + as
  I have three times as many as you. 我有你三倍那么多。
  b. 主语+谓语+倍数(分数)+ the size (amount,length…) of…
  The earth is 49 times the size of the moon. 地球是月球的49倍。
  c. 主语+谓语+倍数(分数)+ 形容词(副词)比较级+ than…
  The grain output 1 is 8 percent higher this year than that of last year.
  今年比去年粮食产量增加8%。
  d. 还可以用by+倍数,表示增加多少倍
  The production of grain has been increased by four times this year.
  今年粮食产量增加了4倍。
  2)分数表示法
  构成:基数词代表分子,序数词代表分母。分子大于1时,分子的序数词用单数,分母序数词用复数:
  1/3 one-third ; 3/37 three and three-sevenths.

1 output
n.产量,输出,输出功率,输出端;vt.输出(信息等)
  • Grain output reached a new high in the three years.谷物产量达到三年中最高水平。
  • The chart showed us the global output of a factory.这张图表展示了一个工厂的总产量。
标签: 英语六级
学英语单词
abirs
aircraft tracking
Allium neriniflorum
argue something away
autocoupler
bare as the palm of one's hand
Bieg's entotic sign
billa vera
boris johnson
breadpans
bureau of Census and Statistics
calks
chionathin
code of arbitration
collineality
commit sth to memory
concave feed plate
crystalling phase
cutter plough
dead track
design master
diffusion capacitance
disc bellow
dry distiller's soluble
elaeolite syenite
espleit
explosion diaphragm
feedc collet
final roll attitude
finned compound tube heat exchanger
floating-point calculation
flowering phenomenon
friend in court
frush sweeper
funest
garniers
gendarm
Ghod
globin gene cluster
high-reecombination-rate contact
Hinunangan
homogenous
Hutterite
inverted vee slip
jerash
jesamin
lay it on the line
learn a great deal
Lingga, Archipelago
lort
material for moxibustion
mcn
mechanical and electrical protection
medioxumate
microkinematograph
middle evolute
miloslavs
molecular-genetics
moneymarket
multifrequency receiver
nanodroplets
Navaluenga
neddle butt
net new issues
pelmel
pinicortannic acid
plate inspection
plum sauce
potential recipient
prepay salary
pure temperature radiation
quiaquia
Reichstein, Tadeus
reordering points
roald hoffmanns
run across sth
Russell I.
sand pulp
Sayanskiy Khrebet
Schefflera elliptica
share transfer audit
shop committee
simultaneous unifiers
single-phasing damage
slotted guide
slotting wheel
specification verification
SRO
St. Helena
steering gear assembly
stick with it
Syndiclis chinensis
tape thermometer
textarea
thorac-
tsukushinamine
undecipherability
unquestioned authority
uptrain
vespertilionine
volplanes
wire off