时间:2018-12-24 作者:英语课 分类:Scientific American(六)月


SSS 2010-06-18 - 英语课
00:00 / 00:00
  1. 1 SSS 2010-06-18 英语课
英语课

You know saving the rainforest is good for biodiversity. But it may also be a boon 1 to human health. That's because less clear-cutting may mean less malaria 2, 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. 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.


 


Thanks for the minute for Scientific Americans' 60-Second Science. I'm Christopher Intagliata.

 



1 boon
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。
2 malaria
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。
3 investigators
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》
4 benign
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。
标签: SSS malaria
学英语单词
acceptable-environmental-range
Akatsi
amaut
American Enterprise Institute
ATARAXOID
atriplex hortenses
be along (to)
biologizing
bluesters
bluetowers
Borel summable
breachable
bullis
cable gas feeding equipment
cache line
candle snuffers
carob bar
caulerpa serrulata lata
circuit switched public data network
cold rolled ribbed steel bar
complete controlled operation
connectivity of kinematic pair
coral polyp
corneoscleral scatter illumination
cost man
crt's
cyclotron-like magnet
episymbioses
four-frequency diplex system
free-form surface
friarly
frozen static seal
glaid
glass fibre laser
helix gear
honeycomb quilt
Horaiji-san
hunger-strikings
huntspersons
hydroxo
inclination of vehicle
Investigator Strait
iron foil
isotropic rotation
itreatic
logic proposition
long term projection
magma column
manned spacecraft backup landing site
metrifudil
Milesburg
neo-classicisms
nornidulin
nucleo-cytoplasmic interreaction
nukkas
NUMARC (Nuclear Management and Resources Council)
number of plungers
observation dome
ochodaeus lanyuensis
oil soluble resin
oophorin
palate post dam
pass book
Paurometubola
phantom pains
Physospermopsis muliensis
plumbing bar
polarecorder
porcellionid
preadolescents
priodont
puffed sleeve
pumpout valve
pyridine sulfate
ranked matching
Ranunculus polyrhizos
Reaper drone
record structure
related trades
remised
retret
reuthe
rings up
RJEP (remote job entry protocol)
rolling yield
rugosin
sciapus latitarsus
semi-weathered state
spray quenchine
Symmetrical Triangle
target-finding
textualise
thermal resistant
three state controller
transvestist
TV play
typhoon-center
unwinly
visted
white feldspars
whole pituitary