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 stay of execution
abnegate
aboundaunce
abstr.
aksus
anthocyaninuria
aronov
biosignature
brine shrimp (artemia)
bubblegums
buma
burning train
butel
Buyukkarabag
ceiling cavity
chaidamuite
compostion of offences
contraceptions
convertible loan stock
counter-demand
cypraea mappa
darbishire
desalination by pressure dialysis
designating parameter calculation
dinner ring
disc process
dogsbodies
double-reduction spur pinion
dribblier
Earth cover.
ends-on
eutectic system
extension activities
flagellate protozoan
for kicks
gaging nozzle
gas caloricity
genus cakiles
geotumor
germanium crystal
get a wiggle on!
gold plated
hardline
hewings
high energy rate forging machine
holdover tax
holmium chloride
hybrid navigation system
hypertensor
interlinearized
jack mechanism
Kiel Canal lamp
law of proportionality of strain to stress
Lollywood
longitudinal incision
machine searching
Mahometical
major role
medetomidine
much-larger
naronta disease
Nayābāri
ninjette
no-work
Norsewood
Nüziders
oesophagostomum
opening a crossing
peine
peisage
phenocritic (haecker 1918)
pneumatic control
pointiest
production engineering
reading for
reclassification entry
reposefully
requarantining
rreig
scheib
side-strains
signal-tuned amplifier
spring scale with stabilized pan
Stejskal
strict stationarity
sulfonyl isocyanate
synkinesia
synthin
taeniae ventriculi tertii
Tanabu-gawa
thacher
thermal greases
thermoperiodism
thrombocyte degeneration
timonies
Tritrichomonas
tunguss
twist-drill
universal donor
value(s) education
Warr
x. c. l.