人类生态系统

[00:02.55]第三单元 五大湖 [00:05.09]Lesson 9 1 Read and act [00:08.18]第九单元 读和表演 [00:11.26]Hey Kevin, where did you say you were born? [00:13.53]嗨,Kevin,你说你在哪里出生的? [00:15.80]I was born in Michigan, USA. [00:1

发表于:2018-12-01 / 阅读(324) / 评论(0) 分类 初中英语人教版初三

The Gulf Coast is bracing for the shoreline impact of the worst oil spill the region's ever faced. NPR's Debbie Elliott reports the growing oil slick threatens wildlife, fisheries and beaches from Louisiana to Florida. Louisiana Governor Bobby Jindal

发表于:2018-12-02 / 阅读(343) / 评论(0) 分类 2010年NPR美国国家公共电台4月

Exhibit Highlights Butterfly's Beauty, Diversity, Value to Ecosystem Flying Canvases They are gentle, colorful creatures that move with grace and flair. And in a warm and humid enclosure at the Smithsonians National Museum of Natural History in Washi

发表于:2018-12-08 / 阅读(401) / 评论(0) 分类 VOA标准英语2013年(三月)

This would put a pipeline to take natural gas 将设置天然气运输管线 from the Beaufort Sea through the heart 从波弗特海穿越 of the third largest watershed basin in the world, 世上第三大水域中心 and the only one which is 95 per

发表于:2018-12-08 / 阅读(305) / 评论(0) 分类 TED演讲娱乐篇

[00:08.59]Lesson 9 1.Read and act [00:14.24]Hey Kevin,where did you say you were born? [00:18.78]I was born in Michigan,USA. [00:23.01]There are a lot of lakes up there,aren't there? [00:27.56]Yeah,I lived on Lake Superior. [00:31.40]Have you ever sw

发表于:2018-12-18 / 阅读(468) / 评论(0) 分类 人教版九年级英语

Small carnivoreslike foxes or raccoons or badgersare themselves prey for larger predatorslike wolves. So they spend time hiding instead of hunting. This influence that big predators have on their ecosystem is called a landscape of fear. But humans ar

发表于:2018-12-24 / 阅读(353) / 评论(0) 分类 2016年Scientific American(八)月

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(286) / 评论(0) 分类 Scientific American(五)月

Without air, water and sunlight there would be no living things. Because they are so important, ecosystems try to be very careful with these valuable resourses. Human beings often throw away things they have used only once. In good ecosystems, resour

发表于:2018-12-29 / 阅读(280) / 评论(0) 分类 高中英语人教版第一册课本听力

Coyotes are wild animals that began moving into metropolitan areas about two decades ago. America's Wild West was known for the phantom howls of coyotes, which were often heard but seldom seen. However, in the past 20 years, these desert dogs, indige

发表于:2019-01-06 / 阅读(253) / 评论(0) 分类 VOA标准英语2010年(九)月

What Is The biggest Mindfuck Ever? 哪些知识最毁三观? 得票最多的回答 @Henry Johnson 1. The continents look entirely different than you think they do. 1.大陆板块本来的样子跟你认为的完全不一样。 The map youre used to

发表于:2019-01-08 / 阅读(401) / 评论(0) 分类 轻松英语

Lonely bug NB: This is not an accurate word-for-word transcript 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

发表于:2019-01-10 / 阅读(371) / 评论(0) 分类 六分钟英语

Severe Drought, Wildfires Threaten Water Resources This is Valles Caldera. Actually, it's the giant mouth of a dormant super volcano that last erupted 40,000 years ago. In the millennia since then, the terrain developed high-elevation forests, of abu

发表于:2019-01-13 / 阅读(370) / 评论(0) 分类 VOA标准英语2012年(一月)

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(303) / 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(297) / 评论(0) 分类 VOA标准英语2010年(七)月

Meat Was Main Dish for Early Humans Modern-day humans eat a lot of meat. Some nutritionists say perhaps too much. But fossils in Tanzania indicate that early humans considered meat a dietary staple much earlier than first thought. Whats more, meat ma

发表于:2019-01-14 / 阅读(263) / 评论(0) 分类 VOA标准英语2012年(十月)

Sorry, Alibaba. Internet portal Tencent is the most valuable brand in China, according to a new ranking by research company Millward Brown. 调查公司华通明略给出的最新排名:对不起,阿里巴巴。中国最有价值的品牌已经是门

发表于:2019-02-09 / 阅读(327) / 评论(0) 分类 阅读空间

Some people think killing animals for food is cruel and unnecessary and some people think it is essential for daily diet. To what extent do you think about these two views? Before we examine the issue of whether killing animals for food is cruel and

发表于:2019-02-14 / 阅读(295) / 评论(0) 分类 雅思英语

About one half of all iPads circulating around the globe are assembled in the southwestern metropolis of Chengdu. Already a hi-tech manufacturing base in the western region, the city is now aiming to become the next Silicon Valley. CRI's Hu Jia has m

发表于:2019-02-14 / 阅读(361) / 评论(0) 分类 世界各地新闻集锦

Ive been a World Cup enthusiast for longer than I care to admit, but I still dont consider myself any kind of expert on soccer. I have, however, become an expert on watching World Cup matches during work hours. Im taking the risk of getting fired for

发表于:2019-02-17 / 阅读(301) / 评论(0) 分类 阅读空间

Coincident with concerns about the accelerating loss of species and habitats has been a growing appreciation of the importance of biological diversity,the number of species in a particular ecosystem,to the health of the Earth and human well-being

发表于:2019-02-19 / 阅读(322) / 评论(0) 分类 托福英语
学英语单词
a cat can look at a king
absolute reference frame
ad-aware
adjustable defecting plate
aeroborne disease
Aeschna
afro-asiatic
al pari
Allium subtilissimum
aranotin
arbitrary-weight lag scheme
Atripalda
axi-symmetric shell
boiler lagging brass strap
bunker coal
car wheels
Cautário, R.
Châtelus-le-Marcheix
Clematis rehderiana
collision prevention of pier and abutment
connecting beam
consumptively
decimal ratio
differential-input voltage range
dolly bar
dystrophia hypophysopriva chronica
eco-warfare
etceteras
face-to-face duplex ball bearing
fiery mine
Filter Presses
fix by position lines
flagship products
foreign-office
freakish
G.N.C.
genus Ilex
haseks
hemihypertrophy
high-loft
holotrichia herwangshana
horn-like process
hospitious
housecleaning
hum-bird
ideal town
instrumentalizing
items of taxation
JULIEX
kasparite
kikuyu
low-growing
ma nishtana
magnetic core stack
majoranttopology
Mbahiakro
microcode compaction
midhat
Murray Seamount
netrum
nipping fork
normal twin
numerical recording device
numerically integrated differental analyzer
on-line journal
p-place
peever
Philhellenists
polish sb off
pollutional condition
pooka
present value control
printing capacity
radar drift
redelivery of vessel
Robilliard Glacier
rocket launching
roll-up
Saccogyna
selvage
shape nuclear isomer
shear-leach process
sibilatory
side bag
single-photon
skoes
sporting-wise
stagger moving-target indicator
standard glass container
stow motor
strincate
superexponentially
swinging winch
teleshopping
uncoaching
Unocal Corporation
valve aortae
vesnyanki (ukraine)
volatilisation
War Secretary
Xenoxylon
Zelenogradsk