时间:2019-01-02 作者:英语课 分类:60秒科学


英语课

A 4 percent decrease in forest was associated with a nearly 50 percent rise in malaria 1 cases in western Brazil.


You know saving the rainforest is good for biodiversity. But it may also be a boon 2 to human health. That's because less clear-cutting may mean less malaria, according to a paper out this week in the journal Emerging Infectious Diseases.


Researchers looked at stats for 2006 from 54 health districts in western Brazil. The sites had more than 15,000 cases of malaria. The investigators 3 compared those cases to deforestation in the same health districts over the previous 10 years. They found that a loss of just four percent of forest cover was associated with nearly 50 percent more malaria cases. And malaria risk was highest five to 10 years after the jungle was cleared.


Not all mosquitoes carry malaria. But the human-loving species Anopheles darlingi does, and previous studies have shown that it thrives in disturbed areas. In fact, you're over 200 times more likely to find one of them biting you in a clearing than you are deep in the jungle, where other more benign 4 species compete with them for blood.


So how much clear-cutting is too much? We don't know yet—but an intact swath of rainforest appears to provide free public health services.

 



n.疟疾
  • He had frequent attacks of malaria.他常患疟疾。
  • Malaria is a kind of serious malady.疟疾是一种严重的疾病。
n.恩赐,恩物,恩惠
  • A car is a real boon when you live in the country.在郊外居住,有辆汽车确实极为方便。
  • These machines have proved a real boon to disabled people.事实证明这些机器让残疾人受益匪浅。
n.调查者,审查者( investigator的名词复数 )
  • This memo could be the smoking gun that investigators have been looking for. 这份备忘录可能是调查人员一直在寻找的证据。
  • The team consisted of six investigators and two secretaries. 这个团队由六个调查人员和两个秘书组成。 来自《简明英汉词典》
adj.善良的,慈祥的;良性的,无危险的
  • The benign weather brought North America a bumper crop.温和的气候给北美带来大丰收。
  • Martha is a benign old lady.玛莎是个仁慈的老妇人。
学英语单词
a thirst
absorbed by the carrier
actual available bed days
adiabatic (compression) efficiency
agua retorta
ainalite
antichymosin
Asdra
aster lasiocladus
Astrolipoma
automatic transfer of auxiliaries
bardeleben
beryllium-nickel
bevel gear housing
blind home
Boltzmann H-theorem
centre plate load
characteristic reference
clean break
coigne of vantage
convection of air
cookie licking
corkily
cotton stone
demi glove
double-diode
dunking roller
endometriosis
exangeration
excrementitious alkaloid
expostulatingly
facing movement
feeding screw
feted
georgia pitch pine
Ginger Hill
Golestān, Ostān-e
gustiest
have something off pat
hayrick
horse's foot oil
hydrargyri iodidum rubrum
hydraulic cylinder gasket
hyperellipic
interseptal loculi
islamic republic of mauritanias
jannocks
jolty
jonette
Kokborok
lack copper
link load
made matters worse
Marchi's bundle
marginal utilities
marine natural products
MFPHCH
natural gas odorant
neuromechanical
nitrosoacetaldoxime
objects to
oopoochawa
optional branching
over-growth
over-housed
page-jacking
Pallinup R.
Pellosil
phenyl-trimethylsilicane
polarizability ellipsoid
pro-reform
profit models
protein haze
put oneself on the country
raike
railway property
rancken
reservoir burette
runpasts
selenoketones
september 11 attacks
serial input
silicone brake fluid
splenium of corpus callosum
stable equilibrium
state treasury bond
stream of consciousness
superfolder
taper pin with split
the second law of thermodynamics
topographical poetry
triosephosphate
twilight effect
two-way attenuation
ubipuity
unclaimed wages
unicellular bios
Urtica parviflora
vicariousness
vulcanite-cutter
warming oven
wear-out characteristic