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
add-substract time
afternoon shift
alkalinisation
aluminium ium ring pull end
annular budding
aporically
application control valve
arm type dividing head
batten clamp
biomedical fluid mechanics
blurred neuron
bookkeeping equation
boss diameter ratio
Briloner Hochfläche
Burke and Hare
business interruption insurances
camp-fires
CCTase
centrifugal forming
cevadilline
chyst
cinnamlyl aldehyde
CIVPP
cloth filler
concupiscences
conditions of end fixity
cystic lithiasis
dermond
domitilas
duraematoma
electrically conductive
epistratal
ethylpropyltin dichloride
expectation
Fan Si Pan
Farrel system
finish machined plate
fragmentin
fuze cavity
Giovanni Jacopo Casanova de Seingalt
heterochromatinic
hickams
high piece rate system
high pressure sterilization
hit parades
hole puncher
homeiest
hoplons
IGMSBM
in the mood
infrared peeling
insulator foot
interoperation
keywell
lactacidogen
lake facies
light-water-cooled
line advance
Lolium remotum
long boom wharf crane
low-volatile coal
Maloye Borisovo
meteorological variable
mutined
needle point lace
Neozoic
Neusorg
nobber
non-Hausdorff space
NOT print
NSD-100880
orbiss
overdefining
phouthang
phyllosticta citricarpa
pleasure boat
preapplying
prevail in
profluvium sanguinis
programmer aptitude tester (pat)
pull-out tendon suture
relaying current transformator
resistance probe
respirement
ricinate
Ritesh
Sansom
scratch hit
semiautomatic pencil
serving of cable
Shijak
sign comparator
sliding foot
sound-proofeds
tapered journal
tithe barn
Tolo Highway
two-slot
unfastenable
vanadium contact process
waveguide type standing wave detector