邻域序列

Editors note: This is the third episode of four-part series on verb tenses. Be sure to listen to part one and part two first. For VOA Learning English, this is Everyday Grammar. Today we are going to talk about the perfect verb tenses. Perfect tenses

发表于:2018-11-27 / 阅读(453) / 评论(0) 分类 2016年VOA慢速英语(十二)月

Section A [00:01.23]1. M: I haven't decided which subject to major in [00:04.96]physics or chemistry. [00:07.76]W: It isn't easy to choose,is it? [00:10.21]Q: What does the woman mean? [00:13.87]2. W: The map shows that this street goes downtown. [00

发表于:2018-11-29 / 阅读(244) / 评论(0) 分类 决胜四级听力必备

Section A [00:01.54]1. M: My grandpa died in 1978. I was 18 years then. [00:08.20]W: That means he would be 76 if he were alive. [00:11.49]Q: How old was his grandpa when he was dead? [00:14.45]2. M: Why are you going so fast? [00:17.53]Where are you

发表于:2018-12-01 / 阅读(296) / 评论(0) 分类 决胜六级英语听力

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Its the time of year to take a look backand thats just what the journal Science did as they listed their most important breakthroughs of 2008. At the v

发表于:2018-12-02 / 阅读(183) / 评论(0) 分类 Scientific American(十二)月

图片 by Jason Marshall Its not often someone suggests that knowing some math could make you the life of the party, but thats exactly what Im going to do. Yes, a properly timed delivery of a few fun facts about the famed Fibonacci sequence just migh

发表于:2018-12-07 / 阅读(171) / 评论(0) 分类 数学英语

[ti:UNIT 7 Enjoy Your Hobby Lesson 56:Unit Review] [0:01.051]Unit 7 [0:02.631]Enjoy Your Hobby [0:04.894]Lesson 56: [0:06.943]Unit Review [0:08.907]I. [0:10.231]Building Your Vocabulary [0:12.963]A. [0:14.500]Fill in each blank with the proper word o

发表于:2018-12-10 / 阅读(181) / 评论(0) 分类 河北教育初中英语(初中起点)八年级上

发表于:2018-12-12 / 阅读(122) / 评论(0) 分类 医务英语

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? The human genome was sequenced, and in the process of moving that forward the technology that was developed was incredible. And because of their efforts in human genome,

发表于:2018-12-24 / 阅读(226) / 评论(0) 分类 Scientific American(十)月

Describing Order and Sequence Patrick: Okay, your first task is to put all of these files in order. Maya: Wow, there must be hundreds of files in this storeroom. How am I supposed to organize them? Patrick: Create a basic filing system. Put things in

发表于:2018-12-27 / 阅读(171) / 评论(0) 分类 2014年ESL之商务英语

图片 by Jason Marshall Some math is functional. Some math is fun. And some math is simply stunning. If that last description sounds improbable to you, then today just might change your mind. Because now that weve covered enough ground, were going t

发表于:2019-01-02 / 阅读(262) / 评论(0) 分类 数学英语

This is Scientific American's 60-Second Science. I'm Steve Mirsky, got a minute? Neandertals were our closest relatives. And now we know a lot more about them. Because researchers have for the first time sequenced a complete Neandertal genomethat of

发表于:2019-01-08 / 阅读(191) / 评论(0) 分类 Scientific American(八)月

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? Robin Williams thought that the platypus was cobbled together by an inebriated deity: Lets take a beaver. Lets put on a ducks bill. Now we know how weird the platypus is

发表于:2019-01-08 / 阅读(181) / 评论(0) 分类 Scientific American(五)月

古埃及金字塔是奴隶制帝王的陵墓,最宏大的当为吉萨三座大金字塔。塔基呈方形,每边长230米,高146米,用230余万块巨石(每块平均重达2.5吨)垒成,国王墓室用一块400吨重的石板垒成。整体规

发表于:2019-02-01 / 阅读(141) / 评论(0) 分类 阅读空间

ALL-WHITE neighbourhoods are effectively extinct, according to The End of the Segregated Century, a recent report by the Manhattan Institute, a New York think-tank. Only 0.5% of Americas 70,000 neighbourhoods are now all-white. In fact, American citi

发表于:2019-02-07 / 阅读(171) / 评论(0) 分类 经济学人综合

BEIJING, Aug. 22 (Xinhuanet) -- Researchers have discovered how a human egg captures an incoming sperm for fertilization, paving the way to help couples suffering from infertility, according to media reports on Monday. An international team of resear

发表于:2019-02-08 / 阅读(193) / 评论(0) 分类 英语新闻

Listen to the schedule of a business trip. Fill in numbers l-8 to point out the sequence of the schedule. I'm leaving for Milan on the 7th of June. l'II arrive there on the 8th evening at about 7:OOpm. Then, l'II take a shuttle bus to the hotel. On t

发表于:2019-02-17 / 阅读(152) / 评论(0) 分类 英语听力练习题

Listen to the dialogues and write the correct sequence of l-6 as mentioned in the dialogues. A:How do I search books from the computer? B:First, key in your PIN number. Then, it goes to the Library's Homepage. Then, you can choose any way you want to

发表于:2019-02-17 / 阅读(131) / 评论(0) 分类 英语听力练习题

With the rapid pace of China's development in the past three decades, the old community culture that was forged during the planned economy is gradually falling apart. But square dancing, which has aroused lots of controversy in the past several years

发表于:2019-02-19 / 阅读(181) / 评论(0) 分类 cctv9英语新闻2016年

Thank you for being here,Fareed.Nice to have you on the show. 多谢你抽空前来 法里德 很高兴你能来上节目 Let's get started first with your background.I do think I know a lot about you. 首先聊聊你的背景 我觉得我很了解你

发表于:2019-02-23 / 阅读(179) / 评论(0) 分类 柯南脱口秀

Poverty, crime and education 贫困、犯罪与教育 The paradox of the ghetto 贫民窟的悖论 Unnervingly, poor children seem to fare better in poor neighbourhoods 令人奇怪的是,穷人家的孩子若是生活在贫困区域,表现反而更

发表于:2019-02-24 / 阅读(137) / 评论(0) 分类 经济学人文艺系列
学英语单词
-ability
681
acidus
al-sudani
aliterate people
aluminium shot
amplitute modulation
arcing-time
astrorocket
autoloading head arm
baking hot
bantam stem
bear an analogy with
brachysporium arecae
cammander
chromatoid body
cise
cleistogamies
coeloblast
creepered
D-homosteroid
debugging aid program
diagram, block
dial pulse incoming register
dimethylpolysiloxane
double error correction
dual-medium filter
earth-ridge
embryonal system
endeavorment
endogamous
exhausted ion exchange resin
free format menu
Gebal
global alliance
grass sod
gyro case
happy slappings
Hemichalcite
highway robbery
histioneis pulchra
homais
hypohemia
ilastical
Ingrians
inquiry-based
isotope signature
isotropisation
jannasch
Krasnik
lamprophonic
layk
manganese(iii) oxide
manure scraper
microinstabilities
microplus Boophilus
microwave trasmitter
narrowleaf penstemon
nonradiable
nonsplinterable
optimization of traffic line and network
organic acid fermentation
partial oxidizing roasting
passenger stock
patnode
phytoclimatic
play the labouring oar
post-structuralism
principal shock
production line of canvas shoes
reentrant superconductivity
reflux circulating
revenue code
rough focusing
saernaite
SAMDC
sarracenin
saxicolous plant
scanner location
sea rate of chronometer
seedling blight
seevers
Short Interest Ratio
speckle width
Spemann, Hans
steel plates for bridges
stellata retinitis
stranded rope
tempati
teplizumab
Teso
Tevcodyne
the appeal
three dimensional probe
titrated
total inspection curve
twist loop formation
two-egg twins
txting
Utelle
vat pigment
Vermilion L.