质量的相对论性变化

For nearly 130 years, the worlds scientists have used a singular small, metal cylinder to define the exact weight of a kilogram. But that is about to change. The cylinder was made in 1889 of platinum and iridium metals. It is called the Grand K. The

发表于:2018-12-08 / 阅读(166) / 评论(0) 分类 2018年VOA慢速英语(十一)月

[00:02.70]Unit 20 New Frontiers [00:06.15]Lesson 3 Scientific Breakthroughs [00:10.11]PIONEERS OF SCIENCE [00:12.16]In the summer of 1905, [00:14.40]a young man was sitting at home [00:15.97]after a day's work. [00:18.04]While rocking his one-year-ol

发表于:2018-12-13 / 阅读(284) / 评论(0) 分类 北师大版高中英语模块7(选修)

Stand Clear Of The Doors: TV Finally Gets On Board With Mass Transit play pause stop mute unmute max volume 00:0003:47repeat repeat off Update Required To play the media you will need to either update your browser to a recent version or update your F

发表于:2018-12-17 / 阅读(176) / 评论(0) 分类 2016年NPR美国国家公共电台12月

Dealing with a Mass Transit Strike Marge: Where have you been? You should have been home over two hours ago! Homer: Ive been trying to get home. Havent you been watching the news? The transportation workers union has voted to strike. There was a mass

发表于:2018-12-27 / 阅读(177) / 评论(0) 分类 2014年ESL之旅行交通购物

[00:03.31]Unit 9 Wheels Culture Corner [00:06.46]America on the wheel [00:09.00]Although the motor car was invented in 1889 [00:12.43]by a German man called Gottlieb Daimler, [00:15.48]it was an American man called Henry Ford [00:18.57]who created th

发表于:2018-12-29 / 阅读(291) / 评论(0) 分类 北师大版高中英语模块3

A gunman in Texas shot and killed 26 people in a church in the small community of Southerland Springs, Texas on Sunday. At least 20 people were injured in the shooting. Victims included children and the elderly. The suspected gunman is also dead. The

发表于:2019-01-03 / 阅读(226) / 评论(0) 分类 2017年VOA慢速英语(十一)月

Mass School Shootings Mostly in Small US Towns In the United States, mass school shootings are most likely to happen in small towns and suburban areas. One example is the shooting last week at a high school in Santa Fe, Texas. Ten people died in the

发表于:2019-01-03 / 阅读(249) / 评论(0) 分类 2018年VOA慢速英语(五)月

Pope Benedict XVI celebrated an open-air Mass on Monday for the sick at the shrine of Lourdes in southwest France. He urged the sick, whom he blessed during the service, to remember that dignity never abandons the sick person. Sabina Castelfranco ha

发表于:2019-01-07 / 阅读(185) / 评论(0) 分类 VOA标准英语2008年(九月)

By Nick Wadhams Nairobi 11 January 2008 Kenya's political opposition says mediation efforts with the government over Kenya's flawed December elections have collapsed and the opposition is now calling for mass rallies across the country next week. Nic

发表于:2019-01-13 / 阅读(218) / 评论(0) 分类 VOA标准英语2008年(一月)

Most Accurate Projection of Polar Ice Melt Produced to Date Measuring ice sheets is a tricky business. Over the last two decades, dozens of studies on ice loss have come up with conflicting results. Now, a global scientific team, reporting in the jou

发表于:2019-01-14 / 阅读(213) / 评论(0) 分类 VOA标准英语2012年(十二月)

DAVID GREENE, HOST: We now know that the man who killed 26 people in a tiny Texas church on Sunday had been court-martialed and discharged from the Air Force for assaulting his wife and child. And authorities say that Devin Patrick Kelley sent threat

发表于:2019-01-16 / 阅读(213) / 评论(0) 分类 2017年NPR美国国家公共电台11月

RACHEL MARTIN, HOST: Catholic dioceses across Pennsylvania are still dealing with the fallout from a grand jury report that came out recently alleging widespread childhood sexual abuse in the state. Virginia Alvino Young from member station WESA has

发表于:2019-01-17 / 阅读(237) / 评论(0) 分类 2018年NPR美国国家公共电台8月

MICHEL MARTIN, HOST: In Thousand Oaks, Calif., Wednesday, 12 people were killed in a Western-themed bar before the shooter is believed to have turned the gun on himself. It has become an all-too-common scene. According to Gun Violence Archive, an ind

发表于:2019-01-17 / 阅读(190) / 评论(0) 分类 2018年NPR美国国家公共电台11月

By Anjana Pasricha New Delhi 05 December 2007 There is a growing chorus of protest among international and local rights groups over the recent mass arrests of minority ethnic Tamils by Sri Lankan authorities. Anjana Pasricha has a report from New Del

发表于:2019-01-31 / 阅读(183) / 评论(0) 分类 VOA常速英语2007年(十二月)

By Sabina Castelfranco Valencia 09 July 2006 Pope Benedict XVI greets Spain's King Juan Carlos, left, and Queen Sofia, center, as he arrives to hold a Mass in Valencia, Spain, Sunday, July 9, 2006 Pope Benedict has ended a lightening visit to Spain

发表于:2019-01-31 / 阅读(217) / 评论(0) 分类 2006年VOA标准英语(七月)

By Gilbert da Costa Abuja 11 September 2006 Federal workers in Nigerian are bracing themselves for mass layoffs following a weekend announcement that some 15,000 workers are to be let go this month. Union officials are reacting angrily to the plan a

发表于:2019-01-31 / 阅读(290) / 评论(0) 分类 2006年VOA标准英语(九月)

By Barbara Schoetzau New York 20 April 2008 Pope Benedict XVI ended his six-day visit to the United States with a jubilant mass at the 57,000-seat Yankee Stadium. From VOA's New York Bureau, correspondent Barbara Schoetzau reports the leader of the w

发表于:2019-01-31 / 阅读(203) / 评论(0) 分类 VOA常速英语2008年(四月)

China opposes proliferation of weapons of mass destruction: FM spokesman BEIJING, Nov. 14 (Xinhua) -- China opposes the proliferation of weapons of mass destruction and their means of delivery, Foreign Ministry spokesman Hong Lei reiterated at a regu

发表于:2019-02-03 / 阅读(210) / 评论(0) 分类 英语新闻

By Scott Stearns Washington 11 January 2007 U.S. President George Bush is sending more troops to Iraq as part of what he says will be a new way forward. VOA White House Correspondent Scott Stearns looks at the president's changing approach to the co

发表于:2019-02-06 / 阅读(223) / 评论(0) 分类 2007年VOA标准英语(一月)

A mass rally and parade has been held in DPRK's capital a day after the Worker's Party wrapped up its first congress in 36 years. Hundreds of thousands of people were seen marching through the main ceremonial square. Participants in Pyongyang practic

发表于:2019-02-18 / 阅读(224) / 评论(0) 分类 cctv9英语新闻2016年
学英语单词
a straight eye
abbot
albers
anticamouflage
appleton thorn
arraignment of government officals
automatic voice switching network
Barhi
BIODEF
birdbander
blackroot share
blew our own trumpet
bookkeeping information
break-time
caloricity of gas
camerine
cane type shift
Ceresan M
changer lever
chief editorial writer
citylike
cleaning gas
concave reflector
conical teeth
constant-pressure start-up
constitutor
countervailing effects
Crus posterius capsulae internae
crybabies
cylindrical harmonic
delayed exploding
diphenhydramine hydrochloride
direct-view storage tube
elusian mystery (greece)
environmental astronomy
ethyl oleate
eucrasic
every now and every now and again
fedoseyev
fissure water pressure
flench-gut
foreshield
gazers
generator motor set
hartworts
have eyes bigger than one's belly
hemiphaedusa bagsana
hydraulic-lock tubing hanger
impredictable
in the bowels of earth
integral body construction
judge ad hoc
Kishinev
locking steel wire
lodberry
low-scorings
lubrication reel
mark sensing column
monetary total
NIC handle
occupational professionalism
oil-proof
on the point of
Pacific sardine
precision-guided munition
press packet
pro-independence
product complex
protosilver
pseudomelanoses
pseudopromycelium
Quartu Sant'Elena
ralt
re-vision
refrigerator wagon
releaded
retro-vaccination
retropod
Sankeys
schiller
scurfin
shitara
shurely shome mishtake
side-crash
steeple head
strike drift
subjoins
superflus
suprarenalectomies
temperature toleration
tetrafluoromethane
the sword of spirit
through hole refueling
Tonggye
tucanoes
unjustnesses
venued
wailment
water-cleft
woodpusher
ydan