向量减法

people appear to born to compute. The numerical skills of children develop so early and so inexorably that it is easy to imagine an internal clock of mathematical maturity guiding their growth. Not long after learning to walk and talk, they can set t

发表于:2018-12-12 / 阅读(132) / 评论(0) 分类 英语小短文

You Do the Math Hello and welcome to Words and Their Stories from VOA Learning English. On this program we explain how to use common expressions in American English. We also explore the origins of these expressions. Where do they come from? Today we

发表于:2018-12-16 / 阅读(218) / 评论(0) 分类 2016年VOA慢速英语(十)月

Good Morning, at the CNN center here in Atlanta, I m Melissa Long, with a look at some of the stories that are happening Now In The News on this Wednesday morning. It's a big day for US automakers. Bankruptcy appears all but certain for General Moto

发表于:2018-12-20 / 阅读(114) / 评论(0) 分类 CNN2009年(五)月

When I was a kid I was top of the class in maths. I was really good at mental arithmetic and doing sums. Things were easy back then, It was all addition and subtraction, multiplication and division. I knew my times tables like the back of my hand. Th

发表于:2018-12-28 / 阅读(157) / 评论(0) 分类 听一分钟英文-M

19.childrens numerical skills people appear to born to compute. The numerical skills of children develop so early and so inexorably that it is easy to imagine an internal clock of mathematical maturity guiding their growth. Not long after learning to

发表于:2019-01-02 / 阅读(478) / 评论(0) 分类 英语范文背诵20篇

I still tend to move my fingers, almost subconsciously, when doing arithmetic. Well, that might not be so strange, according to research published in the May 8th issue of the journal Science. The report says that math and movement through space use

发表于:2019-01-02 / 阅读(168) / 评论(0) 分类 60秒科学

This is Scientific Americans 60-second Science, Im Cynthia Graber. This will just take a minute. I still tend to move my fingers almost subconsciously when doing arithmetic. Well, that might be not so strange according to research published in the Ma

发表于:2019-01-08 / 阅读(154) / 评论(0) 分类 Scientific American(五)月

The Salinity of Ocean Waters If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic s

发表于:2019-01-08 / 阅读(150) / 评论(0) 分类 英语小短文

EDUCATION REPORT - After 40 Years, Calculators in School Still Add Up to Debate By Nancy Steinbach / Broadcast: Wed, 7 Nov 2007 16:00:00 UTC This is the VOA Special English Education Report. Can you do the math: What is one hundred times four, divid

发表于:2019-01-11 / 阅读(113) / 评论(0) 分类 VOA慢速英语2007年(十一)月

When I was a kid I was top of the class in maths. I was really good at mental arithmetic and doing sums. Things were easy back then, It was all addition and subtraction, multiplication and division. I knew my times tables like the back of my hand. Th

发表于:2019-01-21 / 阅读(153) / 评论(0) 分类 纯正英语一分钟

Say it with us: Kids today have it sooooo easy. A new smartphone app will do their math homework for them, provided it's not too complicated. PhotoMath by microblink uses a phone's camera to solve equations and then teaches you the step-by-step metho

发表于:2019-02-02 / 阅读(133) / 评论(0) 分类 阅读空间

add v.(to)加,增加;补充说,又说 解析:addition n.加,加法;附加物 additional a.附加的 subtraction n.减法 division n.除法 multiplication n.乘法 数学plus 加 / minus 减 add up t

发表于:2019-02-03 / 阅读(99) / 评论(0) 分类 英文语法词汇

WASHINGTON, Jan. 28 (Xinhua) -- The U.S. economy expanded by an annual rate of 3.2 percent in the fourth quarter of 2010, partly boosted by personal consumption and exports, the Commerce Department(商务部) reported Friday. U.S. real gross dome

发表于:2019-02-03 / 阅读(120) / 评论(0) 分类 英语新闻

Q: Lately I have struggled to get out of bed despite waking up a decent time to go to my lab (I'm a grad student), the end result being I fall asleep again and end up going in about 11.5 hours later than I really want to. How do I make myself actuall

发表于:2019-02-06 / 阅读(163) / 评论(0) 分类 阅读空间

Children's Numerical Skills People appear to be born to compute. The numerical skills of children develop so early and so inexorably that it is easy to imagine an internal clock of mathematical maturity guiding their growth. Not long after learning t

发表于:2019-02-17 / 阅读(186) / 评论(0) 分类 双语有声阅读

The Salinity of Ocean Waters If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic s

发表于:2019-02-25 / 阅读(194) / 评论(0) 分类 双语有声阅读

New Words 新单词 concrete adj. 具体的 addition n. 加 subtraction n. 减 multiplication n. 乘 division n. 除 frequently adv. 频仍地 withdraw v. 掏出 formula n. 公式,程式 plus prep. 加 minus prep. 减 compound v. 合成 times n. 倍

发表于:2019-02-25 / 阅读(176) / 评论(0) 分类 实用英语

The ways successful people defeat procrastination. 成功人士战胜拖延的方法。 They give up. 他们会放弃 Just because you already poured hours into a project, doesn't mean you need to finish it. This is known as the sunk cost fallacy. Th

发表于:2019-03-06 / 阅读(173) / 评论(0) 分类 英语听力广播—Listening

We have severe vibration coming from the avionics ventilation fan. 461. 我们的电子通风风扇有严重抖振。 There are unusual noises coming from the avionics bay. 462. 电子设备舱有异常噪音。 Our FMS has malfunctioned. Request rad

发表于:2019-03-10 / 阅读(246) / 评论(0) 分类 飞行员英语900句

Request diversion to the nearest suitable airport due AC BUS failure. 501. 我们一个交流汇流条故障了,申请备降到最近合适机场。 We are not supplying power to our DC BUS. Request priority landing. 502. 我们不再为直流汇流条

发表于:2019-03-10 / 阅读(251) / 评论(0) 分类 飞行员英语900句
学英语单词
aarseth-brewington
administrative terminal system (ats)
aislings
aminohexanoic
anodie oxidation treatment
aperture sight
astringency and hemostasis
automobile engines
autonomous region
azimuth scan radar
bell-glass
Ben Quan
birlad (barlad)
block mould
blowing in and blowing out
center duct
common-collector
compensatory theory
contextual criticism
contrast with
crack propagation resistance
Cryototympana
delayed deformation
diapensia
diplatinamine
do the washing up
duplicative
Dyersdale
economic census
electrosurgeries
eleutherodactyline
espousest
Facatativa
fapper
favo(u)rable wind
Ferropyroaurite
field store converter
flections
founding members
free flight
functional fluid
gibbering
gnat-strainer
hexafluoroacetylacetone
house-builders
IAD (initiation area discriminator)
ideal climate
idiographic research
IDNX
Impatiens dicentra
inquiry application
installation site
iron cacodylate
irregular polygon
ISPN
joyances
Lido di Ostia
loading-dock
mass moment of inertia
mathematical operation
maximistic
membrana tensa
Michelia sphaerantha
minimum moisture content
myringo
NBB
neighbo(u)ring vertices
nodi lymphatici poplitiei
noncheating
Optimil
outboard strake
panzanoes
pediocactuss
Pentelikon
preexilian
press for something
reactor well water
reichtard
Rendham
rotary reflection axis
Rumex crispus
seed cigar
semiflexed
single-decker
skybridge
software evaluation and development module
stop-transfer sequence
straight-ticket
Trade barbs
triple substitution
trodden on
unchaining
uncontrolled flight condition
upholstery needles
Ushant
varieose
vert statement
vult
W/L (width to length ratio)
window comparator
woodfillers
WS AT