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
adaptors
Aerofreeze
agistment area
air blow floatation unit
all-you-can-drink
annual mean rainfall
Apology of the Augsburg Confession
b & s wire gauge
back of a book
barium plasma
base depot
battle sight
bde
Bibai
Blastomycoides immitis
bombiosterol
book-maker
canabye
Castelnau's antshrikes
ceanothine
coinsurance
concave extension grate area
conductor cleaning brush
corticothalamic fiber
creedmoor
denet
differential pressure transducer
Dracocephalum
electrically-welded structure
event location occurred address
fair labor standards act (flsa)
franciscus
fulling stripes
gas-cleaning cyclone
gravitons
h(a)ematometra
half-knowledge
hamamelidoxylons
I-CASE
impulse radiation
inextinguishable
injection level
Jabilla
just shoot me
keep someone in play
laser propelled rocket
lay stress on
level-meter
limit depth
line search
load redistribution
local automatically operated unit
Lysenkoist
machine output
mammillothalamic tract
mass transfer factor
Mbit
megascpic
mineowners
mineral dust
myoidism
neuroapoptosis
new-type management groups
nwea
olans
open relay
open-ended grants
organic liquid laser
Orientale basin
orls
paranemic
Poldarsa
precedence type
preliminary sketch
productive rate
purefoy
Qliphothic
Quarles
quintupled torpedo tube set
Rabelaic
ratret
realizest
Reconstructionism
red cedar
refiltration
relativizations
sleep on both ears
spectacless
stodarts
stomatopodas
subcanopies
subroutine register usage
sucker punched
supramandibular
Tammisaari
unsymtrimethyl benzene
unweldable
vacuum approximation
volcanotectonic
wear blue
wet pan grinding
wilcoxon's rank sum test