时间:2018-12-18 作者:英语课 分类:英语专业四级听力50篇


英语课

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 1 rate of wildlife species is experiencing a parallel trend.



Take the United States for instance. In 1990, U.S. population reached an unprecedented 2 level of 250 million, which is approximately 250 times of that of 1800. On the other hand, wildlife species are disappearing from the country at an alarming rate. By 1900, about 70 wildlife species would never be seen in U. S. We are fully 3 justified 4 in declaring that the explosive population growth has had an adverse 5 effect on the survival of wildlife species and will be a constant threat to the wildlife resources if no immediate 6 actions are taken.



Nothing has ever equaled the magnitude and speed with which the human spedes is altering the physical and chemical world. It has been demolishing 7 the environment we are living in.



1 extinction
n.熄灭,消亡,消灭,灭绝,绝种
  • The plant is now in danger of extinction.这种植物现在有绝种的危险。
  • The island's way of life is doomed to extinction.这个岛上的生活方式注定要消失。
2 unprecedented
adj.无前例的,新奇的
  • The air crash caused an unprecedented number of deaths.这次空难的死亡人数是空前的。
  • A flood of this sort is really unprecedented.这样大的洪水真是十年九不遇。
3 fully
adv.完全地,全部地,彻底地;充分地
  • The doctor asked me to breathe in,then to breathe out fully.医生让我先吸气,然后全部呼出。
  • They soon became fully integrated into the local community.他们很快就完全融入了当地人的圈子。
4 justified
a.正当的,有理的
  • She felt fully justified in asking for her money back. 她认为有充分的理由要求退款。
  • The prisoner has certainly justified his claims by his actions. 那个囚犯确实已用自己的行动表明他的要求是正当的。
5 adverse
adj.不利的;有害的;敌对的,不友好的
  • He is adverse to going abroad.他反对出国。
  • The improper use of medicine could lead to severe adverse reactions.用药不当会产生严重的不良反应。
6 immediate
adj.立即的;直接的,最接近的;紧靠的
  • His immediate neighbours felt it their duty to call.他的近邻认为他们有责任去拜访。
  • We declared ourselves for the immediate convocation of the meeting.我们主张立即召开这个会议。
7 demolishing
v.摧毁( demolish的现在分词 );推翻;拆毁(尤指大建筑物);吃光
  • The machine was designed specially for demolishing old buildings. 这种机器是专为拆毁旧楼房而设计的。 来自《用法词典》
  • Conventional demolishing work would have caused considerable interruptions in traffic. 如果采用一般的拆除方法就要引起交通的严重中断。 来自辞典例句
学英语单词
Amphitheriidae
anal pecten
angle measurement network
answer signal with no charge
Antofagasta, L.de
aromatic radical
as't
attapulgite clay
axis of fold
basic environment
benin francs
bradyn
chugging
cloud cover
conjunctive phrase
constructive interference
creamstick
dehydrobaimuxinol
desk
didymium minus
dines compensation theorem
Diuretine
dolfo
dropperfuls
eastlakes
endochondrally
epidemick
fibrinogenically
fixed-point frequency switching
full scale test
gasoline deterioration
genl.
gyromidpoints
hand-fed producer
hard-boil
hipshers
hydrolised dye
hyperdynamic ileus
hyperplasmic obesity
infrared copy paper
infrared photodiode
inquisitous
Karasjok
literary reviews
Ljungaverk
mapper
mean diffusion path
middle chain triglyceride
minutes of arc
mobile number
muff-coupling
Nugaleed, Dooxo (Nugaleed Valley)
overseas contract
parasitocoenosis
parietal veins
Patrinia angustifolia
penketh
phase constant
polycepstrum
portable riveting forge
press-to-talk
prostacyclin(e)
puny
quality survey
quenched spark transmitter
resinaceous
reviewing
ring galaxy
rodnt ulcer
rotating thyristor
Saprolegniales
Saxifraga nakaoides
scandalizers
schistorachis
Schoepfia
segment table base register
skin oil
small project
smaller multangular bone
Soc.,soc.
soft peening
sports-conditioning
spot-size converter integrated laser diode
standing bath
steering knuckle sleeve
steroid ulcer
stumbles into
sweet cherry
synchrosqueezing
takashis
tellins
thymus independent deficiency
trigger button
tripestone
tunicae serosa uteri
UFO religion
uncore prist
under-chord
urophora (urophora) formosana
vacuum braked stock
weighing funnel