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
age play
amylmetacresol
antihedonists
Bacillus brassicae
Ban Ra Wai
be subject to fits of passion
bearing bush half for main bearing
better-informeds
Binary option
binocular heterochromia
boiga irregularis
brake cylinder hanger
breaking pin
bump and rob
cailliets
calibration value
cancelier
Cartan pseudo-convex
certificate in management accounting
clamp dog
common monnow
counting gas
DBOS
deprementia
Dores de Macabu
double-pulsed time
eukamptite
expansion space
first fit partition assignment
Geliting
geotropic root
gerbilles
globe case
glomeratas
Henner, Jean-Jacques
hexagraph
horizontal fault
horizontal-shaft arrangement
hungry puppy
hypothome
incomplete major ninth
Indy d',(Paul Marie Theodore)Vincent
infectress
integratong wattmeter
jefreinoffite (vesuvianite)
junction factor
ligular scar
limitation for deck openings
live steam valve
localite
loony bins
maddoctors
manganism
messoris
microwave emission detector
mis-use land
Moon radar
mottelson valatin effect
multiple transplant
multiresolution
Narga
narrow angle coordinator
nondivergent
nonoestrogenic
odontosoria biflora
PAPW
Paňganiban
pilitzer
plant processes
population mathematics
raphoes
record mark
reenthrone
relaxation principle
Rizan
roamest
safrovanillin
selective radiator
silic-alkali index
speed of action
splits the difference
start capapcitor
step response diagram
stereotypography
superior dental branches
tea china
terminal session
trogloditic
turn sb.'s stomach
under-current protection
unmerry
valveless compressed-air distributing mechanism
variant pump
vendor evaluation
vicepremier
volatile insecticide
volumetrical ratio
voting-methods
woren wire dam
worret
yacht rope
Young's experiment