时间:2018-12-28 作者:英语课 分类:初学者听力文摘精选


英语课

When they hear the name Ben Franklin, many folks think of the Declaration of Independence, the Continental 1 Congress and things like that. Not as many people remember that Franklin was an inventor . . . and a good one, too! He also did some pioneering work in physics.

当人们听到本杰明-富兰克林这个名字时,独立宣言,大陆会议等事件立即浮现在眼前。而作为发明家的富兰克林却不大为人所知。其实他是一名优秀的发明家,并曾在物理学方面做过一些开创性的工作。



Think Fur

思考皮毛



Sure, sure, you say. You think I’m about to tell that old story about flying a kite in a thunderstorm. I can see you reaching for the knob on your radio. But wait!

你连忙说“是是是”,你认为我还是要给你讲老掉牙的电闪雷鸣放风筝的故事。我可以看到你的手伸向电台准备换频道。请等等!



Forget about the kite and think fur instead. Franklin took some fur and rubbed it across a rubber rod. He had suspended the rod by a thin string. Then he tried it with a glass rod. Then he used silk instead of fur. What was he up to?

忘掉风筝的事情吧,思考一下皮毛。富兰克林拿一些皮毛与一根橡胶棒进行摩擦。他用一根细绳将橡胶棒悬空挂起。然后他用一根玻璃棒又试了一下。然后他用丝巾代替了皮毛。他到底想干什么呢?



He was experimenting with electric charge. The glass rod rubbed with silk repelled 3 another glass rod rubbed with silk. The rubber rod rubbed with fur attracted the glass rod. That’s why he was hanging them by strings 4; when they are free to move, you can easily see the attraction and repulsion at work.

他在做电荷实验。用丝巾摩擦过的玻璃棒相互排斥,但是皮毛摩擦过的橡胶棒却与玻璃棒相互吸引。这是他将棒子用细绳悬空而挂的原因。当它们可以自由运动时,你很容易就可以看到它们相吸和相斥的场景。



Electrical Charge

电荷



Nowadays we know that what Franklin was doing was finding different ways to change the net electrical charge on various substances by knocking around electrons. Electrons are tiny, negatively charged particles. Since objects start out with equal amounts positive and negative charge, rubbing electrons off a glass rod with silk will give the glass net positive charge.

如今我们懂得富兰克林实验的目的是通过摩擦电子,通过各种不同的途径在不同的物质上转移电子以改变净电荷。电子是微小的带负电荷的粒子。由于媒介起初带有相等数量的正负电子,玻璃棒与丝巾的摩擦会使得玻璃棒只带有净正电子。



Franklin didn’t know about electrons, but using only very simple materials, he had shown that opposite charges attract and like charges repel 2! He even coined the terms “positive” and “negative.”

富兰克林并不知道电子,但是仅仅使用非常简单的材料,他证明了异性电荷相互吸引,同性电荷相互排斥!他甚至创造了专有名词“正”和“负”。



Not bad for someone who was helping 5 found new countries in his spare time.

在建立新国家的同时,业余时间做点新鲜事也是个不错的选择。

 



1 continental
adj.大陆的,大陆性的,欧洲大陆的
  • A continental climate is different from an insular one.大陆性气候不同于岛屿气候。
  • The most ancient parts of the continental crust are 4000 million years old.大陆地壳最古老的部分有40亿年历史。
2 repel
v.击退,抵制,拒绝,排斥
  • A country must have the will to repel any invader.一个国家得有决心击退任何入侵者。
  • Particles with similar electric charges repel each other.电荷同性的分子互相排斥。
3 repelled
v.击退( repel的过去式和过去分词 );使厌恶;排斥;推开
  • They repelled the enemy. 他们击退了敌军。 来自《简明英汉词典》
  • The minister tremulously, but decidedly, repelled the old man's arm. 而丁梅斯代尔牧师却哆里哆嗦地断然推开了那老人的胳臂。 来自英汉文学 - 红字
4 strings
n.弦
  • He sat on the bed,idly plucking the strings of his guitar.他坐在床上,随意地拨着吉他的弦。
  • She swept her fingers over the strings of the harp.她用手指划过竖琴的琴弦。
5 helping
n.食物的一份&adj.帮助人的,辅助的
  • The poor children regularly pony up for a second helping of my hamburger. 那些可怜的孩子们总是要求我把我的汉堡包再给他们一份。
  • By doing this, they may at times be helping to restore competition. 这样一来, 他在某些时候,有助于竞争的加强。
学英语单词
adjustable volume filling machine
aerial railroad
amioids
anti-mosquito oil
assigned
bellatrice
Bergman operator
blockworks
bulk oil breaker
Camarat, C.
centroid of rudder area
Chamaesphacos
clothes-brushes
condensed routine
creosotic carbonate
customer holdover effect
detailed pending investigation
display column
distant surveillance
ERTS image
Eschrichtius gibbosus
filled charged cell
flexibility constant
folliculiferous
frecom
Google Inc.
greenbottle
hafi
heaumes
hot-cathode lamp
hypesthesia
inherent feedback
jiggish
jula
kalon tripas
large flexible spacecraft vibration control
lastery
loin-rag
Mabibi I.
Macwahoc
material statement
mctaggart
medial epicondyle
milk strainer
muddy flesh
myocardial inflammation
Nakhon Pathom, Changwat
narrative form of statement
netware supplied menu
norgesterone
nuclear spontaneous reaction
O-Cymen-5-OL
ones-of-a-kind
paleobotanically
pandanus utilis bory
parakeratotic
PHALLOSTETHOIDEA
phosphoric anhydirde
pico-programming
place-kickings
pleuritic
posterior facial vein
procez
proton-induced x-ray emission
quinse
recording magnetic field
reentrant programme
reign supreme
relative incidence
salei
scherings
selfer
short money
sinusoid generator
slaymakers
solar-terrestrial phenomena
soothless
soundperson
spectral radiance meter
station-to-station
stenotarsus yoshionis
stibconite
stock brokerage
swaff
swirl plate
tackitt
tardblogs
teleradiography
Terminosporus
the ball is in sb's court
the mass media
throw discretion to the winds
thrutty
time spacing of vehicles
too hot
transfer pricing in competitive intermediate market
tricarballylates
typhlostenosis
undulating horizon
unpractical
wittenstein
worm bearing adjustment