音标:[pɜ:mju:'teɪʃnz] ;
n. (一组事物可能的一种)序列, 排列, 排列中的任一组数字或文字( permutation的复数形式 )
n. an event in which one thing is substituted for another
n. the act of changing the arrangement of a given number of elements
n. complete change in character or condition

permutations的用法和样例:

例句

  1. Multiplication of permutations, unlike multiplication of numbers, is not always commutative.置换的乘法不同于数的乘法,它并不一定满足交换律。
  2. It turns out that all these problems can be solved at once, provided we learn enough about the cycle structure of permutations.结果是,所有这些问题都可以一次解决,只要我们充分地了解各置换的循环结构。

Lesson 6 A B C D 第6课 A B C D 1 Letters 1.字母 A apple A 苹果 B book B 书 C cat C 猫 D door D 门 2 Let's sing a song. 2.来唱一首歌。 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Now I know my ABCs. Next time, sing with me. (歌

发表于:2018-12-12 / 阅读(198) / 评论(0) 分类 VOA2001-国际风云(5)

[00:00.00]REVIEW MODULE UNIT 1 [00:11.21]3.Listen and draw V or X.

发表于:2018-12-12 / 阅读(294) / 评论(0) 分类 新标准小学英语活动用书9册(一年级起点)

You would be nervous if you were representing the human race against a very clever machine. Lee Se-dol, the world champion at Go is due to play a computer with a programme devised by Google. 你若是要代表人类和聪明的机器一决胜负,你也

发表于:2019-02-01 / 阅读(244) / 评论(0) 分类 实用英语

一伙戴着外星人面具劫匪抢劫了卢瑟集团运输车盗走了里面东西克拉克刚好路过试图制止却被其中一名劫匪一拳打翻克拉克惊奇地发现居然拥有和自己相似力量!通过X光视线克拉克发现这名劫匪脑骨中镶着一片金属片 克拉克跟踪艾力克到了一家铸炼厂发现提炼氪石里靠吸收氪来增

发表于:2019-02-05 / 阅读(235) / 评论(0) 分类 超人前传
学英语单词
allantioic cavity
aristida chinensis
assets in kind
Atrioventriculostomy
Autet
azel(-)scope
azimuthal(or zenithal)map projection
ball contact tip
Banandjé
benzylidene aniline
bombloads
caberea lata
California method
cementing manifold truck
central processing unit time
characteristic initial value problem
cocultivate
colloidizing agent
conductive film
continuation school
controlling range
current farm information
current-circulation loss
Cycadofilicales
cyclohexadienylidene
danielson
deaconing
dimin.
disc mower
echinocystic acid
electric steam radiator
eppin
excoriative
feel-better
figari
frost-nip
gang tool
German Baptist Brethren
green-gold
Guadalope, R.
handle with
heat-intolerant
icometry
incestualize
isthmusectomy
jamaica quassias
jive turkeys
knocked down hip
Korinthiakos Kolpos
Kosikovo
kostya
Kuivajoki
lamb chop
lateral tuberosity
left hand adder
level(l)ing screw
mcui
monniots
multiculturally
Nurhachi
omnibenevolent
one's ears are flapping
optimal proportions
oscillometers
overpressure resistant
perforated-plate column
phosphatases
physical path length
physics of radiation therapy
plane-table method
planigales
plugging seat
population equilibrium,population balance
positive photograph
prescheme
Primula advena
rami calcanei laterales
razor-sharp
recurring number
relime
revolving dumper
Ridley R.
Rohdea
royal poincianas
RPHA
Saatta
safari supper
savage mountain scenery
scf (standard cubic feet)
secondary image
sennest
septoria cannabis
shelf reading
sillyness
spring manufacturing
target strength
telary
terpeneless
the former
the stalls
triphenylsilylamine
twenty-third