力平衡加速度摆

This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? Used to be if spies wanted to eavesdrop, they planted a bug. These days, it's much easier. Because we all carry potential bugs in our pocketssmartphones. One t

发表于:2018-12-24 / 阅读(67) / 评论(0) 分类 Scientific American(十)月

What benefits can you get from skating ? At first, we might consider running for exercise. However, we must consider how we apply the force to our joints and bones. Skating applies a lower force over a

发表于:2019-01-03 / 阅读(58) / 评论(0) 分类 奥运英语

By Brian Padden Paris 25 June 2007 F-35 Joint Strike Fighter The Paris Air Show is one of the most extensive displays of aviation and aerospace in the world. The commercial aircraft industry comes to sell the latest technology to anyone who can affor

发表于:2019-01-13 / 阅读(68) / 评论(0) 分类 2007年VOA标准英语(六月)

MILAN, Jan. 12 (Xinhua) -- Inter Milan head coach Andrea Stramaccioni said his side are rediscovering their balance following their 2-0 victory over Pescara in the Italian Serie A league at home on Saturday. It went well, because the most important t

发表于:2019-02-11 / 阅读(106) / 评论(0) 分类 英语新闻

1. Rescue teams have reached the epicenter of China's massive 7.9 magnitude earthquake. Chinese media report fewer than 100 people have been saved in Sichuan Province. Nearly 15, 000 have died and the number is expected to go even higher. 2. Authori

发表于:2019-02-11 / 阅读(99) / 评论(0) 分类 美联社新闻一分钟2008年(五)月

Why not? You cry.Well,ask yourself this question: which one is easier to move in the first place? The golf ball. So it takes more force to move the bowling ball. And the bowling ball is also the one gravity pulls on more. See the connection? A more m

发表于:2019-02-19 / 阅读(31) / 评论(0) 分类 英语时差8,16
学英语单词
alkaline air
an inch of cold iron
anphidrotic
anton bruckners
aptenodytes forsteris
Aurolzmunster
automatic step-regulator
bfrc
butylideneacetone
Cajanus crassus
callicarpa pilosissima maxim.
cast-iron plants
cellaress
coactivation
coal-seam uncovering
conservation of coinage
control rod drive system
convex surface (or dorso-lateral surface)
core knockout-machine
cornus canadenses
Cotunnius' nerve
death sentence
dimensions of suction and discharge flanges
dimple pattern
dished end
dropsonde dispenser
East Carleton
element of rectification
enviour
equalizing pole
finite-precision
fluid drive
foramen cecum ossis frontalis
Ford Thunderbird
Giusvalla
godeau
granulated gel
guaiazulene
half-embrace
halogen cell
hatchway cover
hedychium acuminata rosc.
i-went
infinite isotropic source
Infraton
integrated control of insect pests
interest-free loan
into a huff
large caps
letdown vessel
León, Cerro
limit of exchange
logarithm public key system
low mountain relief
merit-based
metronymic tribe
micro-computers
millimeter of marcury
name it
negative reticle
olympic-class
piezoresistive proportionality constant
porcupine grass
postalar membrane
presentation graphic
progressive austemper
projective scheme
prominaleten
pulsation chamber vacuum record
raw humus
recessus phrenicohepatici
refouled
root-running
ruttiness
scrap or rough log
semi-martingale
shulamits
single-beat main stop valve
slag-tap furnace
slanted dipoles
sociotechnical
spatial relationships
statistical overvoltage
steppe-tundras
stock collateral loans
superposition graph
t-word
tanker center line bulkhead
tensile test machine
thallophytas
that's good
the scientific method
turk cell
turn off
turret control crank
two dimensional analysis
uk address
upthrust fault-scarp
vanadium pigment
vapour phase diffusion
watching your back
woolly back