时间:2019-01-02 作者:英语课 分类:英文杂志-Magazine


英语课

Rainforests rule!by Claire PowellA world like no other – perhaps this is the best way to describe the world of the rainforest. No rainforest is exactly the same – yet most rainforests are now distributed in the small land area 22.5 degrees north and 22.5 degrees south of the Equator, between the Tropic of Capricorn and the Tropic of Cancer. You can find tropical rainforests in South America and Indonesia. Other rainforests flourish further from the Equator, in Thailand and Sri Lanka.


Despite occupying a relatively 1 small area, rainforests have a colossal 2 role to play in maintaining the world as we know it. Tropical rainforests are home to a rich, colourful variety of medicinal plants, food, birds and animals. Can you believe that a single bush in the Amazon may have more species of ants than the whole of Britain! 480 varieties of trees may be found in just one hectare of rainforest. These forests sustain around 50% of all the species on Earth, and offer a way of life to many people living in and around the forest.


Rainforests are the lungs of the planet – storing vast quantities of carbon dioxide and producing a significant amount of the world’s oxygen. Rainforests have their own perfect system for ensuring their own survival; the tall trees make a canopy 3 of branches and leaves which protect themselves, smaller plants, and the forest animals from heavy rain, intense dry heat from the sun and strong winds.


Amazingly, the trees grow in such a way that their leaves and branches, although close together, never actually touch those of another tree. Scientists think this is a deliberate tactic 4 to prevent the spread of any tree diseases and make life more difficult for leaf-eating insects like caterpillars 5. To survive in the forest, animals must climb, jump, fly or glide 6 across the gaps. The ground floor of the forest is not all tangled 7 leaves and bushes, like in films, but is actually fairly clear. It is where leaves decompose 8 into food for the trees and other forest life.


They are not called rainforests for nothing! Rainforests can generate 75% of their own rain. At least 80 inches of rain a year is normal – and in some areas there may be as much as 430 inches of rain annually 9. This is real rain – your umbrella may protect you in a shower, but it won’t keep you dry if there is a full rainstorm. In just two hours, streams can rise ten to twenty feet. The humidity of large rainforests contributes to the formation of rainclouds that may travel to other countries in need of rain.


Worryingly, rainforests around the world are disappearing at an alarming rate, thanks to deforestation, river pollution, and soil erosion as land is being claimed for agriculture and trees are felled for wood. A few thousand years ago, tropical rainforests covered as much as 12% of the land surface on Earth, but today this has fallen to less than 5.3%.


We can only hope that the world governments work together with environmentalists and businesses to use their environmental knowledge and power to preserve the rainforests – awe-inspiring, beautiful and vital for our existence.


 



adv.比较...地,相对地
  • The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
  • The operation was relatively painless.手术相对来说不痛。
adj.异常的,庞大的
  • There has been a colossal waste of public money.一直存在巨大的公款浪费。
  • Some of the tall buildings in that city are colossal.那座城市里的一些高层建筑很庞大。
n.天篷,遮篷
  • The trees formed a leafy canopy above their heads.树木在他们头顶上空形成了一个枝叶茂盛的遮篷。
  • They lay down under a canopy of stars.他们躺在繁星点点的天幕下。
n.战略,策略;adj.战术的,有策略的
  • Reducing prices is a common sales tactic.降价是常用的销售策略。
  • She had often used the tactic of threatening to resign.她惯用以辞职相威胁的手法。
n.毛虫( caterpillar的名词复数 );履带
  • Caterpillars eat the young leaves of this plant. 毛毛虫吃这种植物的嫩叶。
  • Caterpillars change into butterflies or moths. 毛虫能变成蝴蝶或蛾子。 来自辞典例句
n./v.溜,滑行;(时间)消逝
  • We stood in silence watching the snake glide effortlessly.我们噤若寒蝉地站着,眼看那条蛇逍遥自在地游来游去。
  • So graceful was the ballerina that she just seemed to glide.那芭蕾舞女演员翩跹起舞,宛如滑翔。
vi.分解;vt.(使)腐败,(使)腐烂
  • The eggs began to decompose after a day in the sun.鸡蛋在太阳下放了一天后开始变坏。
  • Most animals decompose very quickly after death.大多数动物死后很快腐烂。
adv.一年一次,每年
  • Many migratory birds visit this lake annually.许多候鸟每年到这个湖上作短期逗留。
  • They celebrate their wedding anniversary annually.他们每年庆祝一番结婚纪念日。
学英语单词
absorption cross section
Acipenser schrencki
and the like
antibouncer
archaeological
Arif, Abdul Rahman Mohammed
back date
Balaing
binarite (marcasite)
Bona fide buyer
boxed processor
branch statistics
brendle
bronchial glands
brunost
call lamp
chemical anthropology
closes up
contract microbrew
court of equity
decibel (db)
direct firing system
direct-current telegraphy
drag anchor
duple ratio
electrodynamic vibration machine
ellesmerian
empirical school of management
eneida
energy-conscious
eustyles
excise duties
extraction gravimetric method
freedom of commerce
gasp in admiration
gbp
green parties
head tenon
heat quality
hemimellitic acid
indium hydrogen sulfide
Jackson's epilepsy
La Ferté-Vidame
language lab
lemon-juice
light show
liquid phase extraction
little monkey
magnetic bubble memory (mbm)
maneuvering propeller
maritimes
mauritane
monostyla closterocerca
morainal apron
n-hexylaldehyde
nascent protein
non-functional compound
NOT STRICT
nudas
optimum turn
other optical fiber measurement equipment
overflow attribute
oxalacetic ester
permissible lamp
photobeat
planeness of flange
planting system
plateau gravel
pneumatic liquid density gage
Poupart's line
praam
primary processes
production
pulse build-up time
quiero
railway bureau
regulator cover gasket
reversal nozzle
reverse swing door
ronghage
room temperature control system
safety goals
sand handling
scab union
seal pouring
self-scheduled algorithm
semiconductor barium titanate
serially linked reservoir
Shijǒng
silage combine harvester
single-bed room
sorbitan monolaurate
spade bolt
spark plug tester
sphygmophones
staiver
Tibenzatum
trivialities
ungreases
venit et defendit
ventrolateral compartment
Virus software