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 heavy course load
AACT
Amenfeld's test
apron fabric
argenty
b.i.d.
battery-supply circuit
bitstream requirements
Bonaparte's gull
borough-holder
cable-suspended pump
calyculi gustatorii
capacitors
capituliform
coaxial pump laser
commissionable
constant-mesh gear-box
contract lien
cost-of-living allowance
croftinging
cross-section method for location of line
current measuring instruments
detentenik
DHg,D.Hg.
Dryopteris filix-mas
electric floating crane
epagogic
equalizer fulcrum
erocainide
EULAMELLIDRANCHIA
face milling cutter grinder
fellon
Fenglong
field induced phase transition
Fortcinolone
fractional pitch winding
friction wheel tachometer
gas main
gauck
general reciprocal
genetic fingerprint.ing
hart's ear
high voltage electrophoresis
hostlers
income elasticity of demand for import
Information Industry Association
inquire into a matter
instrumented buoy
interior plain
interjectionalize
journey-men
kdfc
knock someone's eyes out
Lang Sound
law of consumer demand
longitudinal growht
lyophile
Madariaga, Salvador de
Makaton
manual preset controls
metamyelocytes
Minamiaiki
More Tea
nodi lymphatici gluteales
Opoeteren
optical add drop multiplexer
palpocils
parallel method
Piegaro
planefuls
plant health
policy of the big revolver
polycels dyes
portage la prairie
Portalegre, Dist.de
pot-
procymate
raised skylight
rectosigmoidfiberscopy
riboprobes
scirp-
searle's viscomter
shear surface
shutting off
sickle - cell anemia
sporangial sac
take one's change out of someone
Tetraiodoethene
torque
traditional chinese primary character set
turved
verbilki
vertical rotary head milling machine
vibrometer holder
weight-management
will keith kellogs
wooden carving lantern
xanthations
zero-G, zero-g