质心速度向量

发表于:2018-12-08 / 阅读(147) / 评论(0) 分类 医务英语

Researchers: Many Black Holes in Center of Milky Way Galaxy Astronomers say the center of our galaxy has plenty of strange, super gravity objects. For years, scientists believed that circling the center of galaxies, including our own Milky Way galaxy

发表于:2019-01-03 / 阅读(121) / 评论(0) 分类 2018年VOA慢速英语(四)月

379 、 石棉 asbestos;asbestus 380 、 石膏 PlasterofParis 381 、 示波器 oscilloscope 382 、 立体图 pictorialdrawing 383 、 交流电流 alternatingcurrent(a.c.) 384 、 交流电压 a.c.

发表于:2019-01-03 / 阅读(160) / 评论(0) 分类 英文名句短语

分集介绍:导数,斜率,速度与变化率 Derivatives.slope.velocity.rate.of.change

发表于:2019-01-05 / 阅读(402) / 评论(0) 分类 麻省理工学院公开课:单变量微积分

One hundred years ago today, September (the) 27th, 1905, a physics paper was dropped into the mail, addressed to a German journal called AT. The paper was penned by a 26-year-old Swiss patent clerk with dark curly hair years before he sprouted that s

发表于:2019-01-08 / 阅读(213) / 评论(0) 分类 2005年NPR美国国家公共电台

SEC(Single Edge Connector,单边连接器) Shallow-Trench Isolation(浅槽隔离) SIMD(Single Instruction Multiple Data,单指令多数据流) SiO2F(Fluorided Silicon Oxide,二氧氟化

发表于:2019-01-09 / 阅读(173) / 评论(0) 分类 实用英语

This is Scientific American's 60-second science. I'm Carrie Haphgn. Just take a minute. It's tough to have a job with the bosses always riding you. That's literally the case with horse. Now a study finds that the stress experience by the acquire s co

发表于:2019-01-20 / 阅读(140) / 评论(0) 分类 Scientific American(五)月

Imagine the disc of our galaxy, if you just took a disc of stars and put it there, gravity would tend to make this disc collapse/ into itself and it would immediately just fall together. That is not what we see with the galaxy. Whats actually going o

发表于:2019-01-22 / 阅读(133) / 评论(0) 分类 自然百科2011年

Each tag is whipping around the center of the galaxy, the particular, the most striking thing you will notice is the motion of SO2.So SO2 goes on an incredible roller-coaster ride. It comes whipping around and then back out. Something with tremendous

发表于:2019-01-22 / 阅读(117) / 评论(0) 分类 自然百科2011年

The explosion generated a shockwave so massive it wasdetected over 15,000 kilometres away. The low-frequency waves were picked up bymonitoring stations. So it is kind of like a listening network around theworld. Thats right. Theyre not set up for fir

发表于:2019-01-23 / 阅读(109) / 评论(0) 分类 探索与发现2014年

Remember seesaws? Those things were great. But there was often a problem. Suppose theres a big kid on one side and a smaller kid on the other side. The seesaw just stays in one position: big kid on the ground, smaller kid up in the air. No fun. After

发表于:2019-01-26 / 阅读(127) / 评论(0) 分类 英语听力文摘 English Digest

All right then! Imagine this weapon to be ten times stronger and the animal ten times more powerful, launch it at a speed of twenty miles per hour, multiply its mass times its velocity, and you get just the collision we need to cause the specified ca

发表于:2019-01-27 / 阅读(118) / 评论(0) 分类 《海底两万里》中英双语有声读物

WASHINGTON, Feb. 19 (Xinhua) -- NBA's Philadelphia 76ers announced Tuesday that their guard Jason Richardson has undergone successful knee surgery. The 12-year NBA veteran, who has not played for a month and will be sidelined for the rest of the seas

发表于:2019-02-04 / 阅读(172) / 评论(0) 分类 英语新闻

Secretary-Generals Message on World Health Day 秘书长世界卫生日致辞 7 April 2014 2014年4月7日 Every year more than one million people die from diseases carried by mosquitoes, flies, ticks and other insects, such as triatomine bugs. These

发表于:2019-02-09 / 阅读(165) / 评论(0) 分类 英语笔译

Whilst waiting for dinner at Youngs inn, at the confluence of Salt River with the Ohio, 在当地青年旅馆就餐前的闲暇期间,在盐湖与俄亥俄州一处接壤地带, I saw, at my leisure, immense legions still going by, with a front r

发表于:2019-02-13 / 阅读(128) / 评论(0) 分类 美国语文第五册

CLEVELAND, Jan. 9 (Xinhua) -- Cleveland Cavaliers' Brazilian center Anderson Varejao will be sidelined in the next two months after it was revealed he needs surgery on his right knee. Varejao suffered the injury during the Cavaliers' 113-99 defeat to

发表于:2019-02-18 / 阅读(181) / 评论(0) 分类 英语新闻

Theres a simple way to figure out where the center of mass is. If the big kid is two times as heavy as the little kid, then their mutual center of mass will be two times closer to the big kid than to the little kid. Three times heavier and the center

发表于:2019-02-23 / 阅读(148) / 评论(0) 分类 英语时差8,16

Remember seesaws? Those things were great. But there was often a problem. Suppose theres a big kid on one side and a smaller kid on the other side. The seesaw just stays in one position: big kid on the ground, smaller kid up in the air. No fun. After

发表于:2019-02-23 / 阅读(146) / 评论(0) 分类 英语时差8,16

Remember seesaws? Those things were great. But there was often a problem. Suppose theres a big kid on one side and a smaller kid on the other side. The seesaw just stays in one position: big kid on the ground, smaller kid up in the air. No fun. After

发表于:2019-02-24 / 阅读(154) / 评论(0) 分类 英语听力文摘 English Digest

Did you ever dream of digging a hole so deep it came out the other side of the earth? Let's play that game again, using a little physics. First we have to imagine that our tunnel is lined with super-heat-resistant material so we can pass through laye

发表于:2019-03-06 / 阅读(204) / 评论(0) 分类 英语时差8,16
学英语单词
acclimatising
Anhwei
antennal
antinoscope
arch-conservative
azharis
backfriends
band of error
bid form
bolyais
breach of prison
canon of ethics
Cartmel
cassia marginatas
cholalic acid
classification of track
counterworks
cranings
crew's messroom
Cyclobalanopsis kerrii
cyclopean deformity
Dee, John
delusionss of persecution
dyhrkopp
dynamite density
early stage of gastric cancer
ecosystem hierarchical model
electrically connected
erdite
Euromyth
eve-star
flotillin
front runners
function relay
gimpest
gloriations
half-nose
halosauropsis macrochir
handclasps
hissies
hitlers
housekeeping segment
HPr-2
hubeiensis
hygroscopic moisture of grain
ideological barriers
impassiveness
implexions
in-places
inactive entry
initialize mode
isometric coefficient of lactic acid
Kalix
leg-room
locomotive kilometers
lower-division
Lumpeninae
maritime flag
megabromite
Moho boundary
movable ball support
natural crack
Nikol'skoye
nosing bead
oil cakes
Oklahoma City
olenitis
one-way attenuation
overelaborately
Overland Trail
oweiss
oxydiethanoic acid
Paihia
paraskenia
perceived cost
photoemissive tube photometer
Phuc Loi
pipe-laying trencher
port protection device
primary stem villus
professional life
proper functioning of the major organs
reconstructed frame
safety switch
seducees
short-term memories
slum area
solder brazing
sphincter
stable amplitude
statement of the income and expenditure
super-gene
Tamus
tarow
Tate,Nahum
tax-for-fees reform
the same size as
thursday-night
transverse piezooscillation
two thousand
Van Cortlandtville
work-study system