[计] 无穷序列

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(432) / 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(213) / 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(270) / 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(158) / 评论(0) 分类 Scientific American(十二)月

If There’s a Will I am my mother’s third child, born when she was 20. When I was delivered, nurses took me from the room before she could see me. Her doctor gently explained that my left arm was m

发表于:2018-12-05 / 阅读(148) / 评论(0) 分类 英语沙龙2004全年合辑下

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(154) / 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(164) / 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(92) / 评论(0) 分类 医务英语

[00:00.00]When there is no water,there is no surface. [00:03.97]When there is no mind,there can be no anxiety. [00:07.53]The empty head is the beginning of wisdom. [00:12.48]e) Unblocking your emotional flow [00:17.74]Do you find your emotional flow

发表于:2018-12-13 / 阅读(400) / 评论(0) 分类 北师大版高中英语模块10(选修)

The Infinite Library 2 Undoubtedly, it will be a complex task. “It’s not just feeding the books into some kind of digitization machine,” says Susan Wojcicki, leader of the Google Print project.

发表于:2018-12-19 / 阅读(144) / 评论(0) 分类 彭蒙惠英语

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(201) / 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(149) / 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(242) / 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(168) / 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(163) / 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(127) / 评论(0) 分类 阅读空间

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(170) / 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(131) / 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(107) / 评论(0) 分类 英语听力练习题

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(156) / 评论(0) 分类 柯南脱口秀
学英语单词
abrader
acetate butyl
Akwa'ala
Alkoran
alphitomancy
alternative plan
antavir
antimony glance (stibnite)
argillaceous cement
be emptied of
birthing chair
blood electrolyte sensor
CBF
Chibougamau
ciceritol
cold-end temperature difference
Cosmic Background Explorer
cryptographic key translation center
ctenitis maximowiziana
Cyral
dalton school
daturametelins
dearomatized
decidua marginalis
deforestations
disorderly behaviors
draft governing commercial electronic mail abuse act
Duchess of York
educational humaneness
elevator car
empty pages
endoscopic air/water valve
engraved scale thermometer
esea
Eucratides
eyellipse
farebox
five part counterpoint
follow-up transformer
garence
genus Crocethia
gerlach
good strains of seed
gravity curve
guitar nipple
gutlessnesses
half-back
high-magnification seismograph
hydroxytamoxifen
IASY
impact resilience test
industrial waste base course
inoperable trip system
light flux meter
Listera convallarioides
Machilus ovatiloba
mammi-
marginal producer
mass mediation
midwicket
mortalises
mouldable
mud rock flow
Murraya kwangsiensis
Mycobacterium scrofulaceum
null parameter list
number synthesis of mechanism
off-net
office buildings
organdy finish
paratachardina theae
parts reliability improvement routine
patents pool
paternalised
pig factory
plestiodon chinensis chinensis
potential test
private goal
private-activity
Proxapertites
rednecks
regenerative reheater
relative injectivity
reserve for pensions
ride-way
road bureau
rocker type pickling machine
scrid
seikagaku
share operating system
snow ice
subharmonic phase modulation
target state esti mator
the Gestapo
the seabed
threescore years and ten
tie-back casing hanger
tin soldering alloys
value-form of product of labo(u)r
Viola caespitosa
vortex spacing
word character