时间:2019-01-30 作者:英语课 分类:健康与经济


英语课

HEALTH REPORT - Lightning Safety
By Nancy Steinbach


Broadcast: Wednesday, July 21, 2004


This is Phoebe Zimmermann with the VOA Special English Health Report.


People who are hit by lightning and survive often have long-term effects. These may include memory loss, sleep disorders 1, muscle pain and depression.


 
Lightning striking the ground.
Experts tell people to seek the safety of a building or a hard-top vehicle any time they hear thunder, even if it is not raining. They say lightning can strike as far as sixteen kilometers from any rainfall. Lightning can travel sideways. And at least ten percent of lightning happens without any clouds overhead that you can see.


People who are outdoors should make sure they are not the tallest thing around. Bend low to the ground, but do not lie down. And do not stand near a tree or any tall object. Get away from water and anything made of metal. A car is safe, but do not touch any metal inside.


Safety experts say people in buildings should stay away from anything with wires or pipes that lead to the outside. The National Weather Service says if you plan to disconnect any electronic equipment, do so before the storm arrives. Do not use a wired telephone. Do not use water. All these can carry electricity.


Some people think a person struck by lighting 2 carries an electrical charge afterward 3. Experts say this is false. It is safe to begin emergency treatment.


Each year about four-hundred people in the United States are struck by lightning. Last year forty-four people died. The average is close to seventy. The National Weather Service says that is more than are killed by severe storms.


Lightning is a release of energy in the sky. So what causes it? During a storm, the normally neutral particles in clouds hit each other. They become electrically charged. As they flow toward each other, they form an electric spark of light.


Some lightning is created within clouds. Some is created between clouds. And some is created when negative charges move down from the base of a cloud to meet positive charges rising from Earth.


Lightning strikes carry one or more electrical discharges called strokes. The bright light seen in a flash of lightning is called a return stroke. Return strokes travel at the speed of light. They discharge about one hundred million volts 4 of electricity. They heat the air to more than thirty-three thousand degrees Celsius 5. Air heated by return strokes expands and produces the sound of thunder.


This VOA Special English Health Report was written by Nancy Steinbach. This is Phoebe Zimmbermann.



n.混乱( disorder的名词复数 );凌乱;骚乱;(身心、机能)失调
  • Reports of anorexia and other eating disorders are on the increase. 据报告,厌食症和其他饮食方面的功能紊乱发生率正在不断增长。 来自《简明英汉词典》
  • The announcement led to violent civil disorders. 这项宣布引起剧烈的骚乱。 来自《简明英汉词典》
n.照明,光线的明暗,舞台灯光
  • The gas lamp gradually lost ground to electric lighting.煤气灯逐渐为电灯所代替。
  • The lighting in that restaurant is soft and romantic.那个餐馆照明柔和而且浪漫。
adv.后来;以后
  • Let's go to the theatre first and eat afterward. 让我们先去看戏,然后吃饭。
  • Afterward,the boy became a very famous artist.后来,这男孩成为一个很有名的艺术家。
n.(电压单位)伏特( volt的名词复数 )
  • The floating potential, Vf is usually only a few volts below ground. 浮置电势Vf通常只低于接地电位几伏。 来自辞典例句
  • If gamma particles are present, potential differences of several thousand volts can be generated. 如果存在γ粒子,可能产生几千伏的电位差。 来自辞典例句
adj.摄氏温度计的,摄氏的
  • The temperature tonight will fall to seven degrees Celsius.今晚气温将下降到七摄氏度。
  • The maximum temperature in July may be 36 degrees Celsius.七月份最高温度可能达到36摄氏度。
学英语单词
a & s
active expiration
anthemises
aortic pulmonary communication
aphetizes
Ashland City
bar cutting
bearwort
bill-jobbing
biospeceroscope
Bizhbulyak
bottom-bouncing
brillant blue
bundled tube system
calsway
chemism
circulators
combined assessment of system
control documents
Corydalis saxicola
Craf type
Crus laterale
dakhma
downhillers
electrooptical switching
Elkhorn R.
entrics
EPC (easy processing channel)
Equally competition
equvalent lens
exhibeatur. Exhib
fischoff
free-soloing
fritillaria bifloras
general duty police
genus Macowanites
glass applicator
glass machinery
governing system
haldosteronism
hard ship
Harrogate
heat duty
heliotypography
holographic coding plate
honeycomb sandwich
inferrible
Innsworth
interim account
ITSEC
jiseong (chisok)
Kalantonin
lead wolframate
leakage lines
magneto-elastic load cell
maid's hair
melt sandwich
Ministry of Health
molal
Mor R.
mouse hares
multiplicity reactivation
non-grounded system
none of that
nrr
originist
paradibromobenzene
perifollicular fibroma
platode
plutography
polyanth
poop front bulkhead
post-defecation juice
post-officer
proventricle
quiescent-carrier modulation
ranchsliders
Rhynchodina
right to protection of laws
rise of floor
ruffo
see the day
sesquioxidizes
sick-house
signal driver
single row hydraulic type pusher
slip agent
snown
sroculture
stepped-ups
still and all
stratum vasculosum
stress intensity range under cyclic loading
such as it is
teck
test problem
theta
tricycle tractor
unit rotation
verbal mediation theory
whiffle-ball
with terror