材料强度分项系数

material scientists admire spider silk for being lightweight and strong.now another arthropod product is getting into the act insect cuticle,the tough flexible material is inside insect skeleton.researchers at harvard * institute for biological inspi

发表于:2018-12-02 / 阅读(67) / 评论(0) 分类 Scientific American(十二)月

Its the material at the tip of a pencil and it has the potential to revolutionize our lives. A study from Columbia University has shown that graphene is the strongest material in the world. In fact , it is much tougher than diamonds and 300 times str

发表于:2018-12-28 / 阅读(53) / 评论(0) 分类 轻松英文阅读

A tornado rips across the Missouri Plains. Winds over 150 miles per hour shred everything in the twister's path. When it smashes a trailer home, one man is sucked into the heart of the storm, spun and shaken horrifically. His limp body drops out of

发表于:2018-12-30 / 阅读(101) / 评论(0) 分类 国家地理2008年

By Paul Thompson Broadcast: September 10, 2003 (THEME) VOICE ONE: This is Phoebe Zimmermann. VOICE TWO: And this is Steve Ember with the VOA Special English program EXPLORATIONS. Seven astronauts and

发表于:2019-01-11 / 阅读(75) / 评论(0) 分类 VOA2003(下)-美国人文故事

鞋类英语单词 adhesive 粘胶剂 athletic shoes 运动鞋 binding/laces/braids/cords 镶边、线带、鞋带 bottoming room machinery 鞋底机 box toes 内包头 buckles and ornament 鞋扣和饰件 CAD/CAM 计算机辅助设计/制造 casual 休闲鞋 chemical additives 化学添加剂 co

发表于:2019-02-02 / 阅读(109) / 评论(0) 分类 英文语法词汇

在这一周的英国单曲榜当中,由英国著名选秀大赛X Factor冲进决赛阶段的选手们合唱的一首公益歌曲《Hero》空降榜首位置。大约15年前,由花蝴蝶玛丽亚凯丽(Mariah Carey 听歌)演唱的原版《Hero》在英国单曲榜中最高曾排在第七位。 从英国选秀大赛X Factor走出来的选手,

发表于:2019-02-06 / 阅读(85) / 评论(0) 分类 音乐咖啡厅
学英语单词
acetate rayon
alternative routing
aniki
antilethargic
antirhinitis
appoggiatura
arts and crafts
authority oriented
Bandau
broncho-pulmonary dysplasia
brown ring test
bruit de scie
Carum atrosanguineum
chemical carcinogen
chertons
CODASYL-compliant
cognitive dissonance theory
collateral mortgage
colliding-beam source
conveyer axle
cueist
denouement
dipodia
directional unit
dotants
driving device
dunun
electrochemical polarization
exchange message
expanding clutch
fibrous falc
floor hockey
fluosilicate titanium
fly-around
forcing function
fungemia
Ganora
gear driven type
ghol
Gordon Downs
Grenoside
grimsby (great grimsby)
group by group
highbrow press
hull insurance
image pickup tube
in-orbit management
inducedvoltage
informational polity
international capital movement
iontherapy
irrefutableness
jet stream whirl
John Sigismund
juxtapolynomials
Liverdun
locally incorporated bank
lug-loaf
magnetic wave
Mealy machines
Medusa sanguinis hominis
method validation
micro stress region
monohydric acid
Monostomatic
Nodi lymphatici appendiculares
nonsorted sttripe
of independent means
outboard wing
passing ability
photoseparation
physiognomic categories
pig-back kidney
polyisobutylene synthetic rubber
pre-punk
production esthetics
protocollary
pumblenose
queen olive
Radcliff report
rastus
re-alignment
recurrent fluctuation
repdigit
retractable roof
roseum cotton
samples of many barn cleaner
self-excited transductor
single-furrow plow
slag characteristics
sort feature
steyr (steyer)
supinato-extensor
switch order
Temple Bar
ticketlinks
top quarks
Twilighter
unseens
v-groove weld
Vihiers
youth centers