时间:2019-01-22 作者:英语课 分类:英语时差8,16


英语课

 With all the concerns about global warming and climate change one might ask the question, "Why don't species just adapt?" Don takes the devil's advocate position and discusses this with Yael.   D: Yael, we know global warming is bad, right? I mean, the temperature of the air on the Earth's surface is projected to increase at a rate more rapid than any temperature change that has taken place in the last ten thousand years.


Y: Yep--the forecast is pretty grim.
D: So my question is: Why can't species simply adapt to these changes? I mean, they've had to adapt to climate change in the past.
Y: Well, for starters, thanks to ecosystem 1 changes due to agriculture and deforestation and pollution, many species are already weakened to begin with. Plus, in the past, climate change has happened slowly enough that many species had enough time to shift the locations where they grow and reproduce. But the current projected rate of surface temperature change would require for plants to move at a rate of 3.5 miles per year.
D: That's not that bad.
Y: It is if you consider that the fastest plant species only migrate at the rate of 1.3 miles a year.
D: Wow. But that's just plants. What about animals?
Y: It's a problem if their food source doesn't move with them. And it doesn't help that all of the different ways we use land means that the Earth is pretty much a mosaic 2 of different ecosystems 3 rather than larger, contiguous habitats.
D: Oh, so even if a species is able to migrate quickly enough, it has nowhere to go and nothing to eat.
Y: Yep. So you see, Don, the Earth's species simply don't have enough time and resources to adapt to such rapid climate change, and that's why many aren't expected to survive if global warming continues at its currently projected rate.  

n.生态系统
  • This destroyed the ecosystem of the island.这样破坏了岛上的生态系统。
  • We all have an interest in maintaining the integrity of the ecosystem.维持生态系统的完整是我们共同的利益。
n./adj.镶嵌细工的,镶嵌工艺品的,嵌花式的
  • The sky this morning is a mosaic of blue and white.今天早上的天空是幅蓝白相间的画面。
  • The image mosaic is a troublesome work.图象镶嵌是个麻烦的工作。
n.生态系统( ecosystem的名词复数 )
  • There are highly sensitive and delicately balanced ecosystems in the forest. 森林里有高度敏感、灵敏平衡的各种生态系统。 来自《简明英汉词典》
  • Madagascar's ecosystems range from rainforest to semi-desert. 马达加斯加生态系统类型多样,从雨林到半荒漠等不一而足。 来自辞典例句
学英语单词
artificial dielectric
autonomous potentials
balenciagas
balmaseda
Belenus
bird-dogs
blackfellers
Bodenwerder
botraille
burnable absorber
C. E. D.
cabinlift
Calcimar
cannabidiolic acid
cast ewe
centineo
cinnamyl cinnamate
Cirat
clausocalanus furcatus
compound extract
Congo franc
containment annulus
continuous muller
cordesman
corrector loop
cristine
critical volumn
crossword puzzle
crowstons
cruisegoer
cylindrical grinder with wide grinding wheel
dc cable
dealigning
Dhofar
diploma of graduation
Doctyl
drosses
eleemosynar
embedment depth
end burner
end-of-excerpt
Esenguly
extra-hard cold work
feigl
field discharge protection
folliculosebaceous cystic hamartoma
foredoomed
Frankfort on the Main
globosities
gluceth
go to great ends
goldleaf electrometer
ground power
hardening modulus
Hoya multiflora
hypochordal arch
I-FI
immediate execution mode
in bonded system
interphase exchange coefficient
introitus vaginarum
Iranianise
kangaroo system
learning counseling
Li Shizhen
lithophyl
malonyl urea
methylacryloyl-
nonallegorical
partial double hull boat
pearlite (perlite)
peppernel
preparative layer chromatography
quartz exhalite
ratio of the circumference of a circle to its diameter
rector
regional degeneration
removal of impurities from station circuit
rod cluster control changing fixture
runaway chain reaction
scare-fly
scrimpings
sculptural relief
self respect
sergeancies
sharklet
sinusoidal projection
sporas
spring for rocker shaft
start-stop pattern
susanas
switching signal
taking me out
threshing time
Titov Seamount
Toundourou
tunnelway
unselfconsciously
versus analysis
visualisers
waterperries
wide angled lens