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
act independently
affine frame
ahoskie
Aky3p
Alscot Park
analytical curve
angle of reentry
antibody rosetting
asplenium oldhami
background music
be one's own be nobody's enemy but one's own
beardism
beatemest
bi-racial
bohai bay
Bromocryptin
castilles
childers
closed feed cycles
convainquish
Desbarats
devour the way
differential costing
dq
efficiency wage system
El Granada
exhaust clack
factory failure report
fauriella tenuis
fetch store execution ordering
finitely additive probabiltity measure
fishcams
frame for ontangling net
fulfill
galloylarbutin
Gelidocalamus annulatus
Genoas
give the full treatment
guaiac tests
hard surface share
harmatian
head of liquid
HME-AG
hydrogeochemical cycle
inductive compensator
Iodosorb
ion flow
katmai
lateral slope of ground
leptomonas ctenocephali
location method
machine finish
maladive
Mandra
Maud Gonne
maximum non-load speed
medical workers
middle - aged man
mouse poliomyelitis
movie-operator
native bread
nitroxinil
nucleon separation energy
Panoramic receiver.
patch-program plug-board
pen pals
pgas
phosphate desulfurization
Pilzein
plyos
polar figure
powerplant research
programmable multiuse chaining channel
quinicine oxalate
recorder-reproducer
Round Lake Park
Sabandija, R.
salicylazochromotropic acid
scaptomyza (parascaptomyza) pallida
scintillation-counting crystal
serial accumulator
shadow shielding
shunworthy
single - throw switch
sophianic
speciala
sploofs
suppressin
three-roll(er) mill
throatcutting
thrombosed
trihydric alcohol
trombone cooler
twisteth
two-stroke cycle single acting
verticillate flower
Warminster Beds
weakly hyperbolic operator
window closing
Wyloo
Yuqin