准双曲轨道

数学英语 23 What are the Range and Standard Deviation?

by Jason Marshall Weve now talked about three methods for calculating average values: the mean, median, and mode (affectionately known as the three Ms). So, are we done? Is that everything we could ever want to know about interpreting average values?

发表于:2018-12-07 / 阅读(101) / 评论(0)

数学英语

世界各地拍摄到的超级月亮

AS IT IS 2016-10-18 Supermoon Photos Around the World 世界各地拍摄到的超级月亮 This is Whats Trending Today. Something called a supermoon rose at night on October 15 and 16. That is when the moon is full, closer to Earth than usual, and l

发表于:2018-12-08 / 阅读(115) / 评论(0)

2016年VOA慢速英语(十)月

趣味青春英语第87期:Move heaven and earth

Idiom: Move heaven and earth 经历千辛万苦做成某事 Hit the books: 1. space station 空间站 2. soil 土壤 3. astronaut 宇航员 4. orbit 轨道，围绕进行旋转 5. unreliable 不可靠的 6. laptop 手提电脑，笔记本电脑 7. ch

发表于:2018-12-27 / 阅读(69) / 评论(0)

趣味青春英语

VOA慢速英语20060826a

IN THE NEWS - Pluto and Dark Matter Both Star in a Busy Week for AstronomersBy Brianna Blake Broadcast: Saturday, August 26, 2006 This is IN THE NEWS in VOA Special English. Pluto compared to other so

发表于:2019-01-02 / 阅读(64) / 评论(0)

2006年慢速英语（八）月

麻省理工学院公开课：单变量微积分06：指数与对数函数导数、对数微分法

分集介绍：指数,log,对数微分;双曲函数 Exponential.and.log.Logarithmic.differentiation;.hyperbolic.functions

发表于:2019-01-05 / 阅读(370) / 评论(0)

麻省理工学院公开课：单变量微积分

VOA标准英语2011--Space Crew to Enjoy Thanksgiving Feast in Orbit

Space Crew to Enjoy Thanksgiving Feast in Orbit The three crew members on the International Space Station plan to have their own Thanksgiving feast on Thursday as they orbit 352 kilometers above the earth. The lone American on board plans to share so

发表于:2019-01-06 / 阅读(57) / 评论(0)

VOA标准英语2011年(十一月)

SSS 2009-01-05

This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ? We residents of the Milky Way should have a little extra skip in our step today. Turns out our home galaxy is much bigger and moving a lot faster than we previously th

发表于:2019-01-08 / 阅读(97) / 评论(0)

Scientific American(一)月

SSS 2011-10-05

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? The 2011 Nobel Prize in chemistry goes to Daniel Schechtman of the TechnionIsrael Institute of Technology in Haifa. Schechtman discovered what are called quasicrystals.

发表于:2019-01-08 / 阅读(121) / 评论(0)

Scientific American(十)月

科学家称发现太阳系新行星

Is There a Ninth Planet in Our Solar System? 科学家称发现太阳系新行星 Scientists said they have found evidence of a giant planet far out in our solar system. In a statement, the California Institute of Technology Caltech -- said this plan

发表于:2019-01-12 / 阅读(220) / 评论(0)

2016年VOA慢速英语(一)月

2017年CRI China's cargo spacecraft refuels space lab in orbit

China's first cargo spacecraft has refueled the Tiangong-2 space lab in orbit for the first time. Tianzhou-1, which was launched April 20th from Wenchang Space Launch Center in south China's Hainan Province, successfully completed an automated dockin

发表于:2019-01-19 / 阅读(110) / 评论(0)

2017CRI中国国际广播电台

2016年CRI Chinese space lab Tiangong-2 kicks off in-orbit tests, waiting for docking with Shenzhou-11

Hours after Tiangong-2 was successfully launched, the space lab conducted its first transfer of orbit at 2:45 am Beijing time on Friday morning. In the meantime, it has also started in-orbit tests, which are a series of examinations on the functions

发表于:2019-01-19 / 阅读(78) / 评论(0)

2016CRI中国国际广播电台

经济学人117:太空时代的结束

Space exploration 太空探索 The end of the Space Age 太空时代的结束 Inner space is useful. Outer space is history 研究内太空才有用，让外太空研究成为历史 Jun 30th 2011 | from the print edition HOW big is the Earth? Any enc

发表于:2019-01-26 / 阅读(71) / 评论(0)

经济学人综合

VOA慢速英语20060802b

EXPLORATIONS - 'The Greatest Experience': Ed White Goes for the First American Walk in SpaceBy Marilyn Christiano Broadcast: Wednesday, August 02, 2006 EXPLORATIONS -- a program in Special English by

发表于:2019-01-30 / 阅读(63) / 评论(0)

2006年慢速英语（八）月

Orbit tower unveiled in London's Olympic park

LONDON, May 11 (Xinhua) -- A controversial steel tower was unveiled in the Olympic park of London on Friday, about two and a half months before opening of the Games, which was hoped to become of a new icon of the city and bring more visitors. The tow

发表于:2019-02-05 / 阅读(62) / 评论(0)

英语新闻

NASA Messenger Probe Set for Historic Orbit Around Mercury

The U.S. space agency NASAs Messenger probe（正直的，廉洁的） is scheduled to reach Mercury later this week, and become the first spacecraft to orbit the planet closest to the sun. During Messengers year-long orbital mission, scientists exp

发表于:2019-02-05 / 阅读(75) / 评论(0)

英语新闻

MESSENGER Spacecraft Will Be First to Orbit Planet Mercury

The U.S. space probe MESSENGER is poised to enter orbit around Mercury（水银） early Friday, Universal time, capping a nearly seven-year journey to the solar systems innermost planet. Scientists with the U.S. space agency, NASA, hope the orbiting

发表于:2019-02-05 / 阅读(69) / 评论(0)

英语新闻

NASA's twin probes reach lunar orbit

WASHINGTON, Jan. 1 (Xinhua) -- Twin U.S. spacecraft to study the moon from crust to core put themselves into the lunar orbit on New Year's Eve and New Year's Day, the country's space agency said. The second Gravity Recovery And Interior Laboratory, o

发表于:2019-02-05 / 阅读(88) / 评论(0)

英语新闻

Russia determines cause of failed satellite launch

MOSCOW, Aug. 30 (Xinhua) -- Russia's space agency said Tuesday that a Proton-M rocket launch failed earlier this month because of a malfunction in the upper stage. The conclusion was reached by an independent investigation commission following a seri

发表于:2019-02-11 / 阅读(69) / 评论(0)

英语新闻

Iran to launch research satellite into space: report

TEHRAN, Oct. 9 (Xinhua) -- Iran is going to launch domestically- built Navid satellite by Safir satellite launcher by the end of March 2012, the semi-official Mehr news agency reported on Sunday. Navid (promise) is a research satellite and is current

发表于:2019-02-18 / 阅读(76) / 评论(0)

英语新闻

经济学人297:应对小行星撞击近地掠过

Science and technology 科学技术 Dealing with asteroid strikes 应对小行星撞击 A close shave 近地掠过 After a hit and a near miss minds are focusing on the risks from space rocks 在一次撞击和一次近距离擦肩而过后，人们开

发表于:2019-02-18 / 阅读(99) / 评论(0)

经济学人科技系列

最新学习文章

热门学习文章

热门标签

英语听力 VOA标准英语 VOA 英语歌曲口语听力提高听力材料听力教程英语学习 NPR 英语口语 VOA慢速英语美国国家电台儿童英语 VOA英语小学英语 cnn VOA常速英语标准英语英文歌曲听电影学英语英语单词英文电影慢速英语 CRI 美联社新闻美国有线新闻加州分级澳洲新闻流行歌曲常速英语 ABC新闻快递疯狂英语英语读物听力棚车少年经济学人英语词汇商务英语 VOA双语新闻 BBC 中国电台大学英语 Treasures 加州语文 BBC英语英语听力网站 VOA英语教学词汇万花筒 SSS VOA英语听力 AP 新概念分级英语英语广播听力精选英语播客英文绘本 TED演讲赖世雄英语MP3 CCTV9英语新闻 lesson 英语新闻初中英语学英语英语语法历史上的今天英文广播剧英语游戏原版英语小说英语有声读物书虫英语牛津英语读物访谈录新闻一分钟考研英语英语每日在线听新闻 Us 新概念英语地道英语单词第二册自然百科高中英语 sports 实用英语 MP3听力辛沛沛 ESL英语第一册英语每日一句 unit 新东方 GRE 每日一词 BBC听力

学英语单词

administration program

air frame opening seal

Alexius III Angelus

almost complex structure

altocumulus translucidus

anti-acid ceramic equipment