生态系统中的物质和能量

For many years, we have been told that China is rich in various natural resouces so many people take it for granted that they are inexhaustible. people have not considered that one day some of these natural resources will be used up and that we will

发表于:2018-11-28 / 阅读(194) / 评论(0) 分类 疯狂英语易背作文

It scores one point 一朵玫瑰=一个月的房租 A man thinks he scores high with a woman when he does something very big for her, like buying her a new car or taking her on vacation. He assumes he scores less when he does something small, like op

发表于:2018-12-07 / 阅读(161) / 评论(0) 分类 女人香美丽英文

This is Scientific Americans 60-second Science. Im Karen Hopkin, This will just take a minute. Have you ever said, I know it like the back of my hand? Well, how well do you know the back of your hand, or the back of your knee, or behind your ears? Pr

发表于:2018-12-24 / 阅读(137) / 评论(0) 分类 Scientific American(五)月

Matthew: I heard that you work at an renewable energy company. Can you tell me what kind of company it is? Kat: My company is a wind energy company but there's a lot of other options. Matthew: What are the other options and what are the pros and cons

发表于:2018-12-25 / 阅读(112) / 评论(0) 分类 原版英语对话1000个

(man) Today I want to discuss fossil fuels such as coat, oil, and natural gas. The term fossil fuel refers to the trapped remains of plants and animals in sedimentary rock. You see, living plants trap energy from the sun by the process of photosynth

发表于:2018-12-30 / 阅读(111) / 评论(0) 分类 托福听力短文

Asian Carp now outnumber native fish in many areas of the United States and their expansion particularly threatens the fragile ecosystems of the Great Lakes. In an effort to control algae growth, catfish farmers in the southern United States introduc

发表于:2019-01-13 / 阅读(157) / 评论(0) 分类 VOA标准英语2010年(七)月

Kenya's ocean waters are home to five out of the world's eight species of turtles. All are classified as either endangered or critically endangered, and are threatened by poaching, fishing nets, development and pollution. The conservation groups Wata

发表于:2019-01-13 / 阅读(137) / 评论(0) 分类 VOA标准英语2010年(七)月

CERN Accelerator Back in Business 欧洲核子研究中心粒子加速器升级 The long upgrade of the Large Hadron Collider is over. The scientific instrument responsible for the discovery of the Higgs boson -- the so-called God particle -- is bein

发表于:2019-01-14 / 阅读(132) / 评论(0) 分类 VOA标准英语2014年(九月)

Here is an image. 这是一张照片。 Since galaxy clusters are representative slices of the universe, scaled-down versions. 因为星团可以看做是宇宙的缩小版。 They are mostly made up of dark matter, 它们也是大部分由暗物质构

发表于:2019-01-18 / 阅读(103) / 评论(0) 分类 TED演讲商业篇

The solar system is a hostile place. Earth is under attack from deadly cosmic radiation. Life here is only possible, because it's protected by the magnetosphere, an invisible force field that cocoons the planet. But new evidence reveals that this vit

发表于:2019-01-22 / 阅读(127) / 评论(0) 分类 自然百科2011年

By Scott Stearns President Bush says the international community must stand united in its opposition to Iran enriching uranium, which the United States believes is part of a secret plan to develop nuc

发表于:2019-01-31 / 阅读(115) / 评论(0) 分类 VOA2004(下)--新闻盘点

2006职称英语考试模全真拟试题理工类B级(二) 第一部分:词汇选择(第1-15题,每题1分,共15分) 下面共有15句子,每个句子均有一个词或短语划有底横

发表于:2019-02-07 / 阅读(144) / 评论(0) 分类 实用英语

This dark energy doesn't behave like any other substance we know at all and acts more like antigravity force. 这种暗能量的性质与我们所熟知的其他物质完全不同,它更像是反重力。 We say that it has a gravitational pressure

发表于:2019-02-13 / 阅读(106) / 评论(0) 分类 TED演讲教育篇

Looking up at the night sky, we are amazed by how it seems to go on forever. 仰望夜空,我们为它的永无止境而感到惊讶。 But what will the sky look like billions of years from now? 然而数十亿年前的天空又会是什么样子呢

发表于:2019-02-13 / 阅读(130) / 评论(0) 分类 TED演讲教育篇

His famous equation, E =mc 2 , did not appear with the paper, but came in a brief supplement that followed a few months later. As you will recall from school days, E in the equation stands for energy, m for mass, and c 2 for the speed of light square

发表于:2019-02-17 / 阅读(115) / 评论(0) 分类 万物简史

Chinas first dark matter detection satellite Wukong has completed its in-orbit testing. The satellite was launched last December by a Long March rocket. Wukong has detected 460 million high energy particles, and sent about 2.4 terabytes of raw data b

发表于:2019-02-19 / 阅读(156) / 评论(0) 分类 cctv9英语新闻2016年

This is counter to all expectations. It appears that the universe may not only be filled with dark matter, but with dark energy. Scientists sometimes also call it vacuum energy or, more exotically, quintessence. Whatever it is, it seems to be driving

发表于:2019-02-25 / 阅读(156) / 评论(0) 分类 万物简史

Dima: Hello and welcome to this edition of 6 Minute English with me, Dima Kostenko Rebecca: and me, Rebecca Byrne. Dima: Today we'll have some useful words and phrases used in science and environmental studies as we talk about the loneliest creature

发表于:2019-02-27 / 阅读(186) / 评论(0) 分类 一起听英语

(1)it引导的强调句 1)It + is/was + 被强调部分 + that/which/who/whom/whose + 句子的其他成分: 在这一结构中,如果被强调部分是人,用that,who,whom;如果被强调部分是物,用that或which;强调状语时,只能

发表于:2019-03-02 / 阅读(176) / 评论(0) 分类 雅思英语

Since launching in December, China's Dark Matter Particle Explorer (DAMPE) Satellite Wukong has detected 460 million high energy particles, and sent about 2.4 Terra Bytes of raw data back to Earth. Chinese Academy of Sciences senior satellite enginee

发表于:2019-03-04 / 阅读(157) / 评论(0) 分类 2016CRI中国国际广播电台
学英语单词
alautun
ammonium sulfobituminate
Anacardon
anticatalase
avenarin
bacteria filter
braggery
brick up
bullitions
calcinal budding
cancelleation of indebtedness
cheetal
chromel-alumel thermocouple
clone contig mapping
coccidologist
collection post
container anchorage terminal
corrective maintenance time
critical organ
defining value for integer variable
digested
drex
Duhem Margules equation
Dynamic execution
eastwell
edit cue
entelechia
error logger file
Eupodidae
flicks
fluctuating current
gart
gas bleed valve
generator circuit
gleba
Gummistein
haidas
hatch end
heads of government
heptalateral
hypo-chondria
Indomycin
intelligent character recognition
intensifier booster
interleukin-5 (il-5)
internal administrative law
isoentropic flow
kateb
labour cost percentage method
large black colored kidney bean
laser-augmented target acquisition and recognition (latar)
Laughton, Charles
lincord
mechanical templet
misforgive
mixing section
moral decision
octopods
one-sample test
ornelas
otaue (japan)
oven battery
pantograph mechanism
pharyngeal pockets
pock cavity
powerproducing
procellarians
protrusion of intraorbital fat
rank vector
resignals
Retrovaginal
return stolen property
riding-stables
rivingtons
rule structure
S1 nuclease mapping
screening rule
shed tears
side-tracked
simple markup language
simulated formation
simultaneous engineering environment
smarty pants
Somnurol
sowthistle
stemflows
stenonite
streptococcal gingivitis
subassembly shroud
take drugs
tighina (bender)
towing roller
track split
trotternishes
USWB
vapour liquid separator
voronoff
water way transportation
waving
yonekura
youthhood
zotarolimus