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
accurate contour
afocal
air blast injury
air-borne pathogenic organism
allowable sample size
apocalyptists
army officers
astronomical zenith
asymmetric transformation
be elevated to
bigamouse
bill of debt
blossom forth
bozovic
Bromley Cross
burlesque
burn the pavement
butyl mercaptan
class ascidiaceaes
coacernation
control electronics assembly
conventional lw of nations
cormallens
Crimea
cruciform of rudders
crunkled
Cucumis melo inodorus
depauperated
desertion disease
displacement of joint
distance of one complete turnround of locomotive
enstrophe
equinatoxin
external security
fix-up
flec
foot pedal threshing machine
fumulus
gardenalia
GM-1-TRB
gomuti palm
gooseneck pediment
Hamiltonian circuit
Hoagland solution
hot-head
impedance matrix
interpretation algorithm
jds
joint air attack team
keel bolck
Lake Eliza
lehrers
Maloelap Atoll
microbiological condition
molding plate
motyka
moussell
multi-lateral
multi-party line
multilabel
multiple myelomas
nomenclatory
ochidore
paralinomorpha muchei
Paul Whiteman
pertusaria composita
pin-cushion gall
pornograph
potato hollow heart
pro domino
quasi-direct sum
quaysides
republican guards
resisitivity
ryba
safety level of supply
SCMR
scoop it
screw-drivens
ship's mechanical ventilating system
sklerospathit (sclerospathite)
sociable number
solid door
standard activity limit
stern frame casting
stress migration
supplementary acceleration
Synthrin
teaching microscope
thermal charge
to propose
tomentose(tomentous)
tordo
turmoilous
unblameful
unlocking tube
urocystitis
water seal cage
Whig Party
working on live ultrahigh tension power lines
xylaria arbuscula