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
?-branched
acca
acid cleavage
action of tort
akamai
Akenobe
alkali-ash diet
anaesthesiologies
assouf wadi
backchain
bacterium pyogenes anaerobicus
basic-skills
beefaroni
Bopeechee
Brailey's operation
bullous exostosis
capacitive loading
catproofs
charcoal burner
clock buffer
cloud coverage
continuous random network
correction invoice
CP-to-binary code converter
cupola charge
customably
debt of hono(u)r
deep-freeze hold
Deyeuxia flaccida
dimethyl amine
downward spiral
dynamic mounting ring
effective shunt impedance
en-masse
engine pick ups
Eriyechka
evildoings
fabric comfort
Fissistigma tungfangense
fuddy-duddies
gas coke oven
ground starter
high seismic-wave velocity zone
integration of production auxiliary tasks
intelligible meaning
intraterrestrial
katanas
kirghizstans
kupferdiaspor (pseudomalachite)
latticings
Llaima, Vol.
magicoreligious
mass-action equilibria
medium-soft pitch
missest
negative zero
neurokineticism
nothingarian
oom-pah-like
oxacillins
pagina
painted cups
paleoplain
Pbenetbazinum
pedological features
pedretti
peri effect
polar-coordinates drill boom
poliphant
powder-bag
precise fractionation
puka
queer anarchist
quick firing
re-first in first out
resumeth
retrocerebral gland
roeung (cambodia)
rosarii
say one's mind
self-excited AC generator
sexadecimal number systems
signanter
slummery
solicitation display
squalidin
TBIL
tension wrenches
termined
tetralonioidella hoozana
twin gyro pendulous gyrocompass
uncially
under floor wheel lathe
unearthlinesses
universal game player
visible range
vitrella
vituperated
volcanic winters
Wandan Township
watermilfoils
wrnr