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
acoustic convolver
ago-was
Aisch
alerion
amphiprora gigantea
Ancistrodon rhodastoma
automatical control and event sequence
bardeens
bay sickness
breech lock
broad-mindednesses
Butibefen
charging magazine
cheysson
church-hay
civil rights worker
clients fund
coarse asphaltic concrete
come down upon someone like a ton of bricks
covered hopper car
croak
cupelation
diffuse tint
Discocylina
disgraduate
disputed boundary
Dolostsy
Dourbie
ene synthesis
enough to stop a clock
epania brevipennis
fallibleness
fishburns
flexible-chain fibre
frequency-modulate cw (fm-cw)
frostbiting
function letter
generalized distortion constant
germanium
Gojam Kifle Hāger
groupband modem
have a sudden inspiration
headrushes
hump-backeds
Hydroxycarbamid
incoctible
injection water cooling system
irreprehensible
issue of check
jewelled end-plate
Kaly
Kikai-shima
lar gibbon
lattice polynomial
legal affairs department
local height system
lymphonodi retropharyngici
mad cow diseases
magnetic implant
matching magnet
mispriming
moleculelattice
narco
near pointer
nearshore facies
neustadt
normal divisor
number of drilling lines
once or twice
packet level
peripheral folliculosis
picking-up coat
pitch-hill
prayer circle
preliminary budget
qualitative conception
reductometry
refined taste
regulation of pumpage
right ascension
road conditions
Ronne's nasal step
rothensteins
safety test
Sayabec
semarnat
shirtlike
sleeve brick
sludge floe
solaria
speigelman
spronts
sweater strip machine
thoracic fistula
tiger snakes
to starve
Valais, Cant.du (Wallis, Kanton)
vasetomy
verasine
Wikinewsie
Winchester gallons
yellow twining snapdragon