具时滞的种群连续增长模型

Lesson 9 Is It a Good Idea to Control Population Growth in the World? Text What Overpopulation Feels Like We moved slowly through the city in a taxi and entered a crowded slum district. The temperatur

发表于:2018-11-27 / 阅读(268) / 评论(0) 分类 高级口语教程

[00:03.58]You will hear three pieces of recorded material. [00:08.33]Before listening to each one,you will have [00:12.41]time to read the questions related to it. [00:16.85]While listening,answer each question by choosing A,B,C or D. [00:23.41]After

发表于:2018-12-03 / 阅读(250) / 评论(0) 分类 最新版英语听力教程

Women Bear Brunt of Population Growth The global population is expected to rise to nine billion by 2050. Most of that growth will be in developing countries. However, many are asking whether such growth is sustainable, considering the amount of resou

发表于:2018-12-16 / 阅读(104) / 评论(0) 分类 VOA标准英语2013年(六月)

Population Growth It is well-known that there has been a drastic increase in world population. But it is probably less well-known that the extinction rate of wildlife species is experiencing a parallel trend. Take the United States for instance. In 1

发表于:2018-12-18 / 阅读(187) / 评论(0) 分类 英语专业四级听力50篇

Mike出差刚回来,被时差折磨得痛苦不堪,向同事Larry咨询缓解时差的好办法。Larry说, Larry: Some people take herbal medicine, but there's really no solid proof that it works. Some people take sleeping pills and try to sle

发表于:2018-12-25 / 阅读(129) / 评论(0) 分类 礼节美语

The problem of Jet Lag is one every international traveller comes across at some time. But do you have to suffer? Understand what it is, and how a careful diet can minimize its worst effects, and your flights will be less stressful. The effects of ra

发表于:2019-01-02 / 阅读(179) / 评论(0) 分类 双语有声阅读

By Jerilyn Watson Broadcast: September 11, 2003 This is Steve Ember with the VOA Special English Education Report. About one-in-four people age three and older in the United States is a student. The g

发表于:2019-01-02 / 阅读(129) / 评论(0) 分类 VOA2003(下)-教育与新闻

By Michael Bowman Washington 07 March 2006 view Global Population report By 2050, world population is projected to reach nine billion people. That would constitute a 38 percent jump from today's popul

发表于:2019-01-06 / 阅读(226) / 评论(0) 分类 2006年VOA标准英语(三月)

加拿大魁北克乐队Simpla Plan的新单曲Jet Lag同时发行了英语、法语两个版本的,英语版是和英国女歌手Natasha Bedingfield合唱,法语版是和蒙特利尔歌手Marie-Mai合唱。当然我还是喜欢英语版滴.... J

发表于:2019-01-11 / 阅读(151) / 评论(0) 分类 天籁音乐

By Ernest Leong Washington, D.C. 21 August 2006 watch Population report The Population Reference Bureau (P.R.B.) released its annual data sheet on global population growth. The report had some interesting findings. Experts in world population growth

发表于:2019-01-13 / 阅读(226) / 评论(0) 分类 2006年VOA标准英语(八月)

本杰明出差去洛杉矶,长途飞机上感觉头晕、耳朵疼痛。到底怎么回事呢?他是病了吗?在请求空姐帮助后情况如何? Listen Read Learn Flight attendant: What's the matter, sir? You look pale. Benjamin: I feel dizzy and weak. And I'm having this pain in my ear.

发表于:2019-01-16 / 阅读(163) / 评论(0) 分类 英语口语大赢家

Beijing Capital International Airport ranked at the bottom in the on-time performance report with just 18.3-percent of commercial passenger flights leaving on schedule. Shanghai Pudong International Airport reported the second worst departure record

发表于:2019-01-19 / 阅读(120) / 评论(0) 分类 世界各地新闻集锦

Topic1 Journalists must heed ethics in accident coverageAs the whole country prays for the missing Malaysia Airlines flight MH370, there is public discussion as to how journalists should balance between news reporting and media ethics. Family members

发表于:2019-01-21 / 阅读(147) / 评论(0) 分类 英语角-圆桌会议

By June Soh Washington, DC 06 September 2006 watch Language Barriers report Leticia Menjaros(middle), interpreter, helps patient and doctor communicate A recent study says language barriers are causing problems in U.S. hospitals as the population ge

发表于:2019-02-02 / 阅读(232) / 评论(0) 分类 2006年VOA标准英语(九月)

2004 marks the 10th anniversary of the groundbreaking International Conference on Population and Development (ICPD) in Cairo, Egypt, in 1994. Ten years ago, on the eve of World Population Day, a new campaign was launched to raise awareness of how int

发表于:2019-02-03 / 阅读(159) / 评论(0) 分类 阅读空间

BEIJING, Mar. 18 (Xinhuanet) -- Urbanization will be a major feature of China's economic growth and continue to gain momentum, Liu He, Party chief of the Development Research Center of the State Council, said on Saturday. At the China Development For

发表于:2019-02-06 / 阅读(143) / 评论(0) 分类 英语新闻

Time to loosen family planning policy: think tank BEIJING, Oct. 26 (Xinhua) -- China should consider adjusting its family planning policy, as structural problems have overtaken excessive growth as the most significant population-related problem, a go

发表于:2019-02-07 / 阅读(180) / 评论(0) 分类 英语新闻

Mike出差刚回来,被时差折磨得痛苦不堪,向同事Larry咨询缓解时差的好办法。Larry说, Larry: Some people take herbal medicine, but there's really no solid proof that it works. Some people take sleeping pills and try to sle

发表于:2019-02-12 / 阅读(136) / 评论(0) 分类 商务礼节美语

Mike出差刚回来,遇到同事Larry. Larry: Hey, Mike! Good to have you back! You look exhausted! Mike: Hi, Larry. Yeah, I'm totally beat. I can barely keep my eyes open! L: Was it a rough trip? M: Well, it was actually pretty productive, but all

发表于:2019-02-12 / 阅读(166) / 评论(0) 分类 商务礼节美语

Helen : This is Real English from BBC Learning English. Im Helen. ZO : 大家好,欢迎收听今天的地道英语,我是刘佳。 Helen : Today were going to look at words and phrases that have recently become part of the English language. ZO : 要掌握地道的英语,重

发表于:2019-02-26 / 阅读(251) / 评论(0) 分类 地道英语在线听
学英语单词
.pw
alburns
anthraxlike
aspirating pump
balanced mold
blue about the gills
bounce time
bubole analysis
builder's winch
carry rate
charked
chase ride
chinese nation
Church Bay
comb function
Conference Committee
control valve position switch
Corvo, Pta.del
damaged merchandise
damping method
deflection polarity of oscilloscope
dimethylthiourea
dock moving equipment
Dongam
duberstein
enterprise operative technology
equation of state for tension
Faberge, (Peter)Carl Gustavovich
fainting sickness
Ferké
fetter bone
fine comminution
fire-proof district
flaveolum
freeze-dry
fuselage datum attitude
head-up
high modulus furnace black
Histriobdellidae
housetrucker
ichthyological anatomy
inhibitory interneuron
IVTT
joint use telephone
keeps an eye out
kruisinga
land of plenty
levul(in)ic acid
litigious right
magnetoasymmetry
mars pigment
Melanesian
memory method
middling yield
monk's pepper
monodermoma
musical boxes
onplanet
paper for mica tape
peronosporale
photometric-cube optical pyrometer
polar view
poop scoop
positivistic position
post nova
praetor guard
preexistent
preventitious bud
processing interrupt time sharing
protomorphic
recalced
recurrence state
resin finishing
rickamicin
roseately
scanning line density
shilzad
ship biscuit
should be able to
smash-and-grabber
sodear
spade bug
St-Bonnet-le-Froid
St-Chamarand
St-Privat-d'Allier
stompiest
straight binary
strain-measuring bridge
suddently
sunsuit
superior vermian vein
São Paulo, Estado de
tear resistance
tetanics
tooth premature contact
tsinan limestone
Verkhnyaya Balkariya
Viejo, Pico
weightnormal
went wide
wooden tongue depessor
Xanthoceras sorbifolium