时间:2019-01-14 作者:英语课 分类:VOA标准英语2010年(十一)月


英语课

Next year will mark the 110th anniversary of a U.S. government agency that is unknown to most Americans. Yet its work affects their everyday lives in countless 1 ways. Generations knew the agency as the National Bureau of Standards. When it was founded in 1901, electricity was just making its way into widespread commercial use, and the nation used a variety of standards to measure length, weight, and mass. There were something like 30 different ways to measure quantities of liquid, for instance.

The agency is now known as NIST - the National Institute of Standards and Technology. The Washington Post newspaper calls its headquarters complex in Maryland, on what was once a top-secret missile site, Uncle Sam's funhouse.

NISTThis is a corner of the document that some call America's birth certificate, which NIST helped to hermetically seal. It's a 1507 map, now at the Library of Congress, that showed the word America for the first time. There, NIST technicians and scientists come up with new ways to measure things, set standards for products, and test new technology in all sorts of industries. NIST maintains the earth's atomic clock, which is thought to be so accurate, it would take more than 20 million years for it to gain or lose a single second. NIST standardized 2 smoke detector 3 readings, X-ray machines, cholesterol 4 calculations, and gasoline pump calibrations. For the National Archives, NIST scientists enclosed America's Declaration of Independence and Constitution in an aluminum 5 block sealed with tempered glass. NISTNIST helped evaluate various sensors 6 that will likely become part of US soldiers' combat uniforms. They include tiny cameras and sensitive audio microphones. One giant room on the NIST campus is filled with exotic milling, machining, and other industrial equipment. Here, specialists make instruments for NIST researchers, who in turn test everything from bullets to football helmets.

They invent things, too. NIST scientists developed a device that turns computer documents and electronic messages into Braille for the sight-impaired.

These days, NIST is especially hard at work on nanotechnology. The agency that standardized fire hoses and once re-measured and corrected the exact length of a meter has a brand-new complex that is testing and measuring matter as small as an atom.



adj.无数的,多得不计其数的
  • In the war countless innocent people lost their lives.在这场战争中无数无辜的人丧失了性命。
  • I've told you countless times.我已经告诉你无数遍了。
adj.标准化的
  • We use standardized tests to measure scholastic achievement. 我们用标准化考试来衡量学生的学业成绩。
  • The parts of an automobile are standardized. 汽车零件是标准化了的。
n.发觉者,探测器
  • The detector is housed in a streamlined cylindrical container.探测器安装在流线型圆柱形容器内。
  • Please walk through the metal detector.请走过金属检测器。
n.(U)胆固醇
  • There is cholesterol in the cell of body.人体细胞里有胆固醇。
  • They are determining the serum-protein and cholesterol levels.他们正在测定血清蛋白和胆固醇的浓度。
n.(aluminium)铝
  • The aluminum sheets cannot be too much thicker than 0.04 inches.铝板厚度不能超过0.04英寸。
  • During the launch phase,it would ride in a protective aluminum shell.在发射阶段,它盛在一只保护的铝壳里。
n.传感器,灵敏元件( sensor的名词复数 )
  • There were more than 2000 sensors here. 这里装有两千多个灵敏元件。 来自《简明英汉词典》
  • Significant changes have been noted where sensors were exposed to trichloride. 当传感器暴露在三氯化物中时,有很大变化。 来自辞典例句
学英语单词
0870
addition subtraction diagram
amplitude-level selection
antiallergenics
antifoundational
arylalkylamine
bags holed by cargo hooks
ball tipped pipette
be restored to reason
bolshoy tuder
Brandscheid
caniforms
city-bound
clearness of bole
Clisham
close coupled pump
comment text
consanguineously
constitution granted by the sovereign
corrosion kinetics
Corsican mint
crab hand
cryoprotective
detailed process
diffuser head
dispersed
dithane
domical protusion
dynamics of stream
eration
evaporator plant
faanishness
farewellers
flat disk turbine agitator
fritzell
full text database
generation of alternatives
gibt
give it a rest
gluoin
grid course
hemophagocytosis
hiccoughing
high-bulk yarn
hornowls
impinging jet
inclosure(enclosure)
intraepldermic
jebel ali
keymask
lifting method
load supporting device
mark-up calculator
mink frog
N-(2-methylimidazol-1-ethyl)urea
neutral red PS
non-synchronizing
nontolerant
on-site reprocessing
open type transformer
pars infundibularis
peristalsis pump
photoconductive property
physical measurement unit
pickard
porphyran
prestart checklist
put down for
quasi-superordinates
quotation for building a workshop
radical centre
radio colloid
radium dial
raise a price
real-time collaboration
Riverius salt
Saint Clair River
Schizopepon
seiser
separator table
shark ray
shiplap lagging
single-turn coil
special telephone
spiculae
table tennis ball
take the ground
Taussig, Frank William
thrash over old straw
tonkin, gulf of
trenefald
ultrasonic carver
uncensors
under conditions of
undulatory nystagmus
up-leg
Vabrocid
Vagenda
vectorlyser
Volterra equations
wise porgy
xenon stroboscope