变形势能

Welcome to the Science Talk, the weekly podcast of Scientific American posted on February 18th, 2010. I am Steve Mirsky. And you know what the hottest sport in the world is right now? Thanks to the Winter Olympics, it is, of course, curling. That's t

发表于:2018-12-24 / 阅读(53) / 评论(0) 分类 Scientific American(二)月

Potential energy in a crossbow When we think of the concept of energy, we often think of objects in motion: a car rolling down a hill or a jogger running up a hill. This kind of energy-in-motion, called kinetic energy, isnt the only kind of energy. A

发表于:2018-12-27 / 阅读(23) / 评论(0) 分类 英语时差8,16

And it's why, over the last eight years, we've modernized the government's approach to innovation for the 21st Century. 也因此,在过去的8年里,我们让政府在21世纪的创新方式上现代化。 We've jumpstarted a clean energy revolution

发表于:2018-12-30 / 阅读(19) / 评论(0) 分类 奥巴马每周电视讲话

Fusion is how stars produce energy. It occurs when the nuclei of light atoms, such as hydrogen, are fused together under extreme pressure and heat. Tokamak Energy, from Oxfordshire, believes that the third version of their compact, spherical tokamak

发表于:2019-01-17 / 阅读(96) / 评论(0) 分类 2015CRI中国国际广播电台

How to Create Passion Anywhere and Anytime Remember Science class? Mr. Thatcher, sophomore year in high school, taught us about potential and kinetic energy. I was way more interested in Pam Miller, who sat perilously close to me. But on Mr Thatcher

发表于:2019-02-11 / 阅读(56) / 评论(0) 分类 阅读空间

Sit on a swing, let someone push you, and away you go. But what happens if the person who pushed you walks away, and you want to swing faster and higher. If you've ever been in the second grade, you know the solution to that. Just start pumping your

发表于:2019-03-06 / 阅读(145) / 评论(0) 分类 英语时差8,16
学英语单词
air-lance
algal culture
aluminium spraying
androphage
anierior pillar of fauces
arc-lamp
artificial law
Baroness Emmusca Orczy
buoyancy tank
Buron
camber design
carideans
carpenter's finish
cart-way
chlamys
chusts
combined maintenance truck
cotton grasses
crapitalism
ctenophore genus
customer,s ledger
decacyclic
deliverypersons
disturbed forest
downsizings
drain valve access
Duane's clinometer
dyscrase
earth resistance meter
ESSFLO Chart
fail links
feed-rate
Felixdorf
franchised
free electricity
fresh pork
galvanized sheet iron roof
general average guarantee
get hurt
high speed laser printer
high-aluminous
Hiroto-gawa
icosahedral symmetry
industrial dust
inlet flow control valve
ionic structure
iron porphyrin protein
Ligularia xanthotricha
lost in
Mahayana
marse
micron efficiency curve
miscellaneous cases
miville
monolithic bipolar transistor
multipurpose
multisystemic treatment (mst)
national institutes of healths
Nucifraga caryocatactes
outgeneraling
pea-greens
petromyzontiform
photoresistor ceramics
Pitt Str.
post-ovulation
procurement card
programmable repeat access
Ranunculus platyspermus
read control register
recrediting
reducing twin bend
reflectivenesses
regardest
resonant column test
retroregulation
returned bill
Roche-Talamie, Barrage de la
rotational control
sand boil
scaler circuit
scianni
single-fee traffic
sorting of kiln clay product
spiral band swelling
stoelting
subsidized-housing
Syringa emodi
terminal pump station
transition roller
trocasuture
trough axis
Tubeco
Tulpetlac
ulrichile
vengeancely
vertically offset rhomboid system
virtual c-bus service unit
walk over sb
weakly connected digraph
wilbury