时间:2018-12-26 作者:英语课 分类:美国英语听力80篇


英语课

[00:04.57]A new American study shows that chemicals used to kill insects in the home may increase the risk of developing Parkinson's disease.

[00:17.14]Earlier studies have shown that people who work around pesticides 1 are at greater risk of developing the disease.

[00:26.25]But scientists say the latest study is the first to link the'disease to the use of pesticides in the home.

[00:35.42]Parkinson's is a disease of the central nervous system.

[00:40.88]It causes the loss of a chemical in the brain called dopamine.

[00:46.68]As the disease progresses, it causes the muscles to become hard and difficult to move.

[00:54.23]It also causes the arms and legs to shake.

[00:58.70]Scientists at Stanford University in California studied about 500 people from northern California who have Parkinson's disease.

[01:11.47]The people were asked detailed 2 questions about past use of pesticides and other chemicals in their homes or outdoor gardens.

[01:22.52]This information from the Parkinson's patients was compared with information from more than 500 people who did not have the disease.

[01:34.09]Researchers found that the people who were exposed to pesticides

[01:39.68]were more than two times as likely to develop Parkinson's disease as those who were not exposed to the chemicals.

[01:48.96]Scientists say exposure to pesticides in the home was linked to the highest risk of developing the disease.

[01:58.88]People who used pesticides in their outdoor gardens were not found to be at greater risk for Parkinson's.

[02:08.16]It is not clear why pesticides may increase the risk of Parkinson's disease.

[02:15.55]Scientists say some chemical compounds may target and kill cells in some parts of the brain.

[02:24.69]Damage to nerve cells in a part of the brain called the substantia nigra leads to signs of Parkinson's disease.

[02:34.31]Lorene Nelson is the leading researcher of the Study.

[02:40.68]She presented the findings earlier this month at the yearly meeting of the American Academy of Neurobiology in San Diego,California.

[02:51.08]She says chemicals in the environment may cause the death of some brain cells.

[02:59.04]But she says it is too early to suggest that people change their use of pesticides.

[03:06.85]Ms Nelson says more studies are needed before scientists can know for sure what causes Parkinson's disease.



1 pesticides
n.杀虫剂( pesticide的名词复数 );除害药物
  • vegetables grown without the use of pesticides 未用杀虫剂种植的蔬菜
  • There is a lot of concern over the amount of herbicides and pesticides used in farming. 人们对农业上灭草剂和杀虫剂的用量非常担忧。 来自《简明英汉词典》
2 detailed
adj.详细的,详尽的,极注意细节的,完全的
  • He had made a detailed study of the terrain.他对地形作了缜密的研究。
  • A detailed list of our publications is available on request.我们的出版物有一份详细的目录备索。
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abscessed teeth
adamellite
administer relief
almas
aul wan
barytons
Batu Pulai, Sungai
be skilled at
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borefest
cancer pathophysiology
carotid arch
catch a disease
centrifugal pendulum
civitated
country of residence
cromoglycate
decision support system - DSS
dial - up access
down price
ekalead
electronic pick up
emoia atrocostata
epithallus
fairy circles
feel your way
ferroelectric non-volatile memory
final working drawings
firedamp migration
go on errands
gurdfish
hemicontinuous operator
herborises
honeycomb radiator
incidence point
indolent
internal cylindrical gauge
IPG
japann
judicial separation
jump out of skin
Karkar I.
kissins
koat
la charite
Leontopolis
ligg. intercuneiformia plantaria
light repeater
linkage analysis
location variable type
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magnetoresistances
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marine refraction seismic survey
master scheduler
mercuric lactate
mercury ballast of gyrocompass
methylal resin
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Molotor cocktail
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orbifolding
ordered scattering
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receiver operating characteristics curve
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Routh array table
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subsurface burst
superhigh frequency
talk down to
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unheal
xenocrystal