时间:2019-01-06 作者:英语课 分类:2007年VOA标准英语(七月)


英语课
By Carol Pearson
Washington
04 July 2007
 


Researchers have found that chocolate – dark chocolate – is good for your heart. They say it may stave off hardening of the arteries 1 among smokers 2, and it has more antioxidants per gram than red wine, green tea or berries. The latest study on chocolate shows it may be better for you than you think and that some people may even want to eat chocolate for medicinal purposes. VOA's Carol Pearson has the latest.


Chocolate lovers take heart.  Doctors have known for some time that chocolate is good for you -- dark chocolate, that is.


"Our dark chocolate is 73 percent pure cocoa," says Sam Aboulhosn, who makes handmade, European-style chocolates at his chocolate shop near Washington, D.C.  Although people buy his chocolate for its taste, not its medicinal value.


Researchers have found that eating some dark chocolate every day could help reduce high blood pressure. The study has been published in the Journal of the American Medical Association.  Dr. Dirk Taubert and colleagues at University Hospital of Cologne gave chocolate to 44 otherwise healthy people with high blood pressure.  This is what they found: "The dark chocolate reduced the systolic blood pressure, the top reading of the blood pressure, by 2.9 units, and the diastolic blood pressure, the bottom reading of blood pressure by 1.9 units. The white chocolate had no effect on blood pressure," added Dr. Taubert.






Can chocolate be considered medicine?


Can chocolate be considered medicine?



Other studies show milk chocolate, white chocolate, or dark chocolate eaten with milk do not have the same benefits as plain dark chocolate.


Dark chocolate contains chemicals called polyphenols. Dr. Taubert says polyphenols in dark chocolate seem to increase the production of a substance in the body called nitric oxide 3, which causes the blood vessels 4 to widen, making more room for the blood to flow and lowering blood pressure. 


"Our study,” says the doctor, “provides sufficient evidence to recommend low amounts of polyphenol-rich dark chocolate as an addition to a healthy diet."


That's good news for people who have high blood pressure.


"That's a wonderful reason to have dark chocolate," adds a chocolate lover.


But some people may not like the taste. "There's a simple rule,” explains Dr. Taubert. “The [more] bitter the chocolate tastes, the more polyphenols [the] chocolate will contain."


And one other thing:  no one in the study gained weight because the researchers found that only a very small amount -- seven grams of dark chocolate -- was sufficient to lower blood pressure by a few points.


"We were indeed surprised that such a low amount of chocolate could efficiently 5 reduce the blood pressure," said Taubert. Which is good, because chocolate contains a lot of fat. 


Dr. David Katz is a weight control specialist. He warns people not to eat too much of a good thing. "If you over indulge, then the benefits no longer win out."


And gaining weight is not good for people with high blood pressure.




n.动脉( artery的名词复数 );干线,要道
  • Even grafting new blood vessels in place of the diseased coronary arteries has been tried. 甚至移植新血管代替不健康的冠状动脉的方法都已经试过。 来自《简明英汉词典》
  • This is the place where the three main arteries of West London traffic met. 这就是伦敦西部三条主要交通干线的交汇处。 来自《简明英汉词典》
吸烟者( smoker的名词复数 )
  • Many smokers who are chemically addicted to nicotine cannot cut down easily. 许多有尼古丁瘾的抽烟人不容易把烟戒掉。
  • Chain smokers don't care about the dangers of smoking. 烟鬼似乎不在乎吸烟带来的种种危害。
n.氧化物
  • Oxide is usually seen in our daily life.在我们的日常生活中氧化物很常见。
  • How can you get rid of this oxide coating?你们该怎样除去这些氧化皮?
n.血管( vessel的名词复数 );船;容器;(具有特殊品质或接受特殊品质的)人
  • The river is navigable by vessels of up to 90 tons. 90 吨以下的船只可以从这条河通过。 来自《简明英汉词典》
  • All modern vessels of any size are fitted with radar installations. 所有现代化船只都有雷达装置。 来自《现代汉英综合大词典》
adv.高效率地,有能力地
  • The worker oils the machine to operate it more efficiently.工人给机器上油以使机器运转更有效。
  • Local authorities have to learn to allocate resources efficiently.地方政府必须学会有效地分配资源。
学英语单词
-s
5'-Deoxyadenosyl-B12
acid fast red
Aegerita
albumin milk
almeida pilosa
amoralists
amphoteric ion-exchangeresin
anti-impact gear
batouti
blast furnace smelting
bunss
cabinetmaker
cauliflora
CD Video
Churumuco
COBOL transaction program
collapsible keel block
corecipients
dihydropyrimidinase
direct exporttrade
draw-
drip-drying
escrowing
esterifiable
Ethydan
ethyl cyanamide
filtered signal
fire bricks
flamdoodle
Florence crystals
foam solution
folded potential
forestry production statistics
fully arisen sea
general fixed assets group of accounts
genus Hamamelis
genus irenas
Grecian nose
groaners
Guengant
Haskins
hcb
ill-humo(u)redly
in conjunction with
input/output stream control
inseminating catheter
insured risk
joint buying office
Kentish fire
lande's g factor
Lincolnshire
look-at-me signal
magon
managed economies
merphenyl
metropolitan broadband network
mobile control room
Muncimir
national switching network
network for arc welding
non-metered tap
not the done thing
nuclei cochleares
Oetinghausen
pastures newer pastures
Pelargonium limoneum
pen lid
penetration method
permeably
Ping Pong buffer
powerful radio-frequency cable
pump for sludge tank
punctuation space
Quinalspan
redalder
reduced flange
regulating error
requirement for tax exemption
self-skill
shape straighten
shelf front
ST_including-and-excluding_covering-and-adding-layers
suele
taper-reamer
taste acuity
technico-
telecommunication route
throw up one's hat
transiliac
travel card
triatic
uncountry
variation in testing temperature
vibroplatform
Villaputzu
Virtual File Allocation Table
vision distance
well-illuminated
what are we waiting for
yester-morrows
z transform inverse