主序星;矮星

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(392) / 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(167) / 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(190) / 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(109) / 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(116) / 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(125) / 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(58) / 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(156) / 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(107) / 评论(0) 分类 2014年ESL之商务英语

Model 2 What did you think about the movie? John: So what did you think about the movie? Laura: Well I think this Star Wars episode is an excellent piece of work, but not as good as the previous ones. John: Really? But I think this Star Wars episode

发表于:2018-12-29 / 阅读(62) / 评论(0) 分类 新视野大学英语:视听说教程 2

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(197) / 评论(0) 分类 数学英语

A Chinese spice that increases the flavour of food has become the centre of public attention, thanks to the growing profile of bird flu . Star anise, a herbal fruit mainly grown in China, as well as V

发表于:2019-01-03 / 阅读(93) / 评论(0) 分类 奥运英语

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(115) / 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(110) / 评论(0) 分类 Scientific American(五)月

Now the Sun will be burning hydrogen as the stars doing in the main sequence until the hydrogen is exhausted in the core, and at that point the stars start to die, the outer layer of the Sun will expand, the Sun will move away from the main sequence

发表于:2019-01-11 / 阅读(88) / 评论(0) 分类 探索与发现2015年

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(80) / 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(119) / 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(87) / 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(70) / 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(82) / 评论(0) 分类 柯南脱口秀
学英语单词
abetalipoproteinemias
agosta
alkaline earth metal compound
alosa pseudoharenguss
amorolfin
Angmagssalik
antiknock additive
Ashbocking
auxemasterol
beepidity
block tectonics
blue poppies
bridge rail
bumble-puppy
butt-resistance-welding
Caltha natans
capacity region of down bound
Catanduanes I.
causatively
celery seed
champagne problems
combustion tube
configs
consumer-lending
cycloiropia
decibels relative to one millivolt
dimension text
dimethyltryptamine
diolic acid
Divino das Laranjeiras
duotricenary
DUSC
electoral council
electric induction
empty of meaning
epiphyta arboricosa
escalation-of-force
external function name
exurb
ferret-sized
fitterer pyrometer
flipperty-flopperty
floating chafing block
frequency band of emission
fuel gaseous
guilt-freer
Haemophilus
heavy fuel
high resolution interferometric sounder
hoist control valve adapter
hypsographies
Ichifusa-yama
implementation of packet level
infirmaries
initial criticality test
intercellular secretory capillary
intramolluscan phase
KRS
legal bibliography
Mamaranui
manurance
Maschinenfabrik Augsburg-Nurnberg
mcconnel
medeva
meniscus instability
minimal change group
multichannel dispenser
naphtholdisulfonic acid
nephrostoma
nonintegral quantity
obituarian
operator's circuit
ossa metatarsalia I-V
PBNC (Pacific Basin Nuclear Conference)
perala
pin type insulator
pneumatic steelmaking
polymeric form
ponsardins
portable thickness gauge
private-public
quadruple pass
seiche disaster
shaft filler washer
sickle cell hemolytic anemia
silicon fusion transistor
slickster
soil-drilling test
solid bed of catalyst
the multitude
the Southern Ocean
three-input amplitude adder
total write time
transitional
Trigonotis floribunda
trus
two-plate press
ultrasonic Doppler blood pressure transducer
waterhorse
well-trusted
Western Hemispherian
zaglossus bruijni