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
.dot files
aerial tower
after burn
Alviri-Vidari
american silver
anthodium
apple rot
arnaout (albania)
automatic electrically heated waterer
benzoyl hydride
boots-on-the-ground
bornesitol
Bright,Richard
build a dam
chemical powder extinguisher
chronic hematogenous pulmonary tuberculosis
chyle corpuscle
come the acid
credit cooperative
curbless
decompensated cirrhosis
diphtheric pseudomembrane
Distoma pulmonale
do a disappearing act
domesticate foreign customs
dual power locomative
electric meffle furnace
employee hand book
enneapterygius nanus
estuarial model
eyepiece micrometer
first-order perturbation
fluorothene
foreshadowings
four-piecest
gamma silumin
genus Claytonia
glass dish evaporation test
Gledhill
goal drought
hafnium boride
half-site
Hamiltonian line
heavy layer
Hebridean Isles
heliozincograph
hicatee
indication marks
indirect tests
interlocking operator
isotopically modified compound
just ton
korsnes (korsnaes)
laser computer
line of shearing stress
line-filter balance
lose track
make award on item by item basis
Mendelian law
metabolic disease
Myodo
neutron-electron interaction
non-local coupling
nonconvex quadratic programming
notandcircuit
orographically
orthorhombic hemimorphic
Pachyrhizus erosus Urban.
Paschim Bāsna
pollution relationships
portable debugging tool
price break conversion factor
progress of cargo work
prohibition-era
quasisocial
raise one's voice
rich coil
roving
sa'ar
Salix occidentalisinensis
saltwood
seim
self-simulating equation
siding for splitting train
softbill
specifics
staphylo-opsonic indices
stop-gaps
story completion
three-phase four-wire system
to croak
undercapitalisation
up-hill side
vesting deed
vim and vigor
virulent bubo
wash place
wealing
week-ends
work quality target
XERXES
zone transport refiner