非稠合芳烃化合物;联苯型化合物

[00:00.00]在线英语听力室( www.tingroom.com )友情制作 [00:03.81]1999 Passage4 [00:07.51]When a Scottish research team startled the world [00:10.54]by revealing 3 months ago [00:12.61]that it had cloned an adult sheep, [00:14.94]President Clinton move

发表于:2018-12-01 / 阅读(388) / 评论(0) 分类 历年考研英语阅读理解

Grammar Girl here. Todays topic is the complex-compound sentence. Guest writer Sal Glynn writes: Most writers worth their fingertip calluses begin as avid readers. We read books, magazines, and websites indiscriminately until we start to notice the w

发表于:2018-12-07 / 阅读(165) / 评论(0) 分类 英语语法 Grammar Girl

As they grow bigger and bigger, 随着体积越来越大 they start to spin and throw out a disk of debris 它们开始旋转,甩出的碎屑形成盘状 that will coalesce to form a solar system. 在日后融合形成太阳系 This kind of process

发表于:2018-12-07 / 阅读(174) / 评论(0) 分类 太阳科普

OK, one more thing, if I can even get more bizarre. 另外还有一件事是更难以想象的 Since virtually all the mass of an atom is in the nucleus 既然事实是原子的全部质量集中在原子核, now, there is some amount of mass in th

发表于:2018-12-08 / 阅读(140) / 评论(0) 分类 TED演讲教育篇

Information Overload By Robert S. Boyd Knight Ridder Newspapers. Distributed by Tribune Media Services International. Are you overwhelmed by the amount of information these days? 1 Ever feel overwhelm

发表于:2018-12-19 / 阅读(154) / 评论(0) 分类 彭蒙惠英语

Why are there males and females? Why are there two sexes instead of three, or twelve, or one? On this Moment of Science we'll learn why two is the magic number. Let's start with why there is sex at all. When two organisms reproduce sexually, sperm an

发表于:2018-12-27 / 阅读(113) / 评论(0) 分类 英语听力广播—Listening

Intonation can indicate completely different meanings for otherwise similar words or phrases. For example, an English teacher teaches English, but an English teacher is from England; French class is where you study French, but French class is Gallic

发表于:2018-12-27 / 阅读(119) / 评论(0) 分类 美式英语正音训练

Science and Technolgy. 科技。 Modern alchemy. 现代炼金术。 Turning a line. 进入新的一行。 The race to extend the periodic table continues. 扩展元素周期表的比赛仍在继续。 ONE of the first inklings that chemistry has an u

发表于:2018-12-31 / 阅读(207) / 评论(0) 分类 经济学人科技系列

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(173) / 评论(0) 分类 Scientific American(八)月

This is Scientific Americans 60-Second Science. Im Sophie Bushwick. Got a Minute? What's the best way to find out if an unknown mixture contains a specific substance, like an environmental contaminant? You could use an expensive, bulky gas chromatogr

发表于:2019-01-08 / 阅读(168) / 评论(0) 分类 Scientific American(八)月

The source of Energy A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun's very center. It is here that is to be found the source of the energy that the Sun constantly pours out into

发表于:2019-01-08 / 阅读(202) / 评论(0) 分类 英语小短文

AGRICULTURE REPORT - Scientists Find Compound in Smoke that Helps Seeds Grow By Mario Ritter Broadcast: Tuesday, July 20, 2004 This is Steve Ember with the VOA Special English Agriculture Report. A di

发表于:2019-01-11 / 阅读(167) / 评论(0) 分类 农业与发展

The United Nation's World Food Program says rogue members of Somalia's extremist al-Shabab group attempted to raid its compound late Sunday in the Somali town of Wajid, about 300 kilometers northwest of Mogadishu. World Food Program spokesman, Peter

发表于:2019-01-14 / 阅读(202) / 评论(0) 分类 VOA标准英语2009年(八月)

[Verse 1] Looking for a way in It's a big step, when you fall in And every single touch says How you need it, can you feel me It comes on a whirlwind And it blows in, like a hurricane Till you wonder where you are And how you got so far [Chorus] I'll

发表于:2019-01-14 / 阅读(140) / 评论(0) 分类 节奏布鲁斯

What do these five words have in common: hotdog, fireworks, well-being, waistline, sunset and ice cream? They could all describe a fun holiday celebration. For example: My holiday was wonderful! I went to a friends party and we laughed, ate and had a

发表于:2019-01-21 / 阅读(212) / 评论(0) 分类 2018年VOA慢速英语(十二)月

By Elizabeth Carlassare. Todays topic is compound interest. Albert Einstein is often quoted as having said something to the effect that compound interest is the greatest wonder of the universe. Its an urban legend, but it packs some punch! In todays

发表于:2019-01-30 / 阅读(191) / 评论(0) 分类 货币英语

Questions 12-20 The elements other than hydrogen and helium exist In such small quantities that it is accurate to say that the universe somewhat more than 25 percent helium by weight and somewhat less than 25 percent hydrogen. Astronomers have measur

发表于:2019-02-05 / 阅读(166) / 评论(0) 分类 托福英语

Indoor air pollution is a common threat to human health, the new study looked at five common house plants and found that when it comes to removing harmful chemicals from the air, those five plants are better than others. 室内空气污染对人类健康

发表于:2019-02-07 / 阅读(161) / 评论(0) 分类 阅读空间

ISLAMABAD, Feb. 25 (Xinhua) -- The living compound of the former al-Qaida chief Osama bin Laden in Pakistan's northwest city of Abbottabad is being demolished, said one local media report. Local Urdu TV channel Express said that the front part of bin

发表于:2019-02-18 / 阅读(137) / 评论(0) 分类 英语新闻

本期内容: A humble houseplant with a dash of rabbit DNA could help lower our exposure to indoor air pollution, new research suggests. Scientists have revealed that by inserting a rabbit gene into devils ivy the plant is able to clean the surrou

发表于:2019-02-20 / 阅读(135) / 评论(0) 分类 夏说英语新闻晨读
学英语单词
-frons
0412
9-hendecynoic acid
acid degradation
air-depolarized battery
antenna down-lead
aplotomy
area meter
Atacamenian
aurosulfo
baryta-coated photographic paper
beerbohms
beryllium-microcline
BFUP
binary-to-octal converter
Bis-2-Ethyl-Hexyl-Phthalate
bone tumor
cajunbot
CD Interactive
cecilio
ceint
change.gov
cleaning line
data communication equipment (dce)
deoccate
diphenyl carbinol
disdainfulnesses
dulaney
duplicating flask
equivalated
fabricable
fetiferous
firnification
fixed gas fire-extinguishing system
floating landing stage
forestful
french weeds
fuery
g pad
Google Apps for Education
graduated vessels
Gramadal
grandisol
Grotthus'chain theory
habitant
heart capillaries
hepatitis externa
hyporthodus octofasciatus
inclined ramp
innoculations
international labor organizations
job status
Klosterfelde
like gangbusters
load tension curve
mahaut fibre
mascarenhas
memonic code
mutual exclusivity bias
no-right
Nueva, I.
optical action
organization for trade cooperation
osteogenically
overwrapped gas cylinder
phthisis confirmata
polar fronts
potassium perthiocarbonate
Pratas
proportional pary
purified salt
quartz-fluorite achromat
radioactive transient equilibrium
record in external file
residential area
rr. viscerales (aort? thoracalis)
sabit
Santorini
search condition
segmentable
self-production
signal mask
slab stress due to thermal warping
slow-curing paving binder
space psychology
split-brain
St Patrick, Co.of
straight-gauge
stress control
subdelegates
subsonic effuser
tators
transgenation
transient period
undiplomaed
union reducer
unitary transformation group
vegans
War dial
wilde
working years
yurie