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
Abuscreen
acetylcholine agonist
anatectic earthquake
baffle cloth
belt bags
biological dispersion
boutonniered
cattle-trespass
city-council
CM-CSF
coalifications
computable functions
consolidated undrained compression test
convention bump
coronarium
corrosion peak
customs law
delayed neutron area
dime-store
direct sampling technique
district manager
dnockout latch
double motion agitator
drop zone
Emdex
encincture
English vice
European Law Enforcement Organisation
extrapolated unity-gain frequency
eye glass
Franglais,franglais
glove output device
Gulf Co-operation Council
hamartophobia
high-capacity head
Hilir Perak
inner diameter of flexspline
intercalary
jackfish
Kocha-gundo
Kumkale
light field photography
Liu Yi San
main engine stuffing box lubricating oil dirty tank
manipulator sleeve
marmite
material advanced
mating annular face
Mazorete
media events
mill stream
minimum-variance
mixing memory
Montsoué
Move handle
Naegleria
package goods
palace quard
palaeodendrology
paper-doll fetus
patentee code
petametres
pleasancy
pnf
primer lock
primitive color
prince of wales, cape
pro-treaty
program library table
proto syntex indexing (psi)
pycnofibre
pyrenula kelungana
raphael
reproducible wealth
rhabdophis swinhonis
Shemini Atzereth
short term money
skeptophylaxis
skete
Somme
sorting conveyor
sprig tails
spring-wood
state of existence
sub-carrier frequency shift
suets
symbolic microprogram
terrain-cure
the opium of the people
thioacetal
toad's-eye tin
two-control aircraft
United Nations Children's Fund
untwilled
valve test
village hamlet
welded-on flange
whole cloth
woodrum
X-ray tomographic table
youth-trainings
zhannas