单词：isolated point of a topological space
单词：isolated point of a topological space 相关文章
A supermassive black hole is quite simply gravity gone mad. An object of such concentrated matter its gravitational pull is insatiable. Nothing can escape it, not even light itself. Anything that gets
超大质量黑洞
The Hubble telescope has given us spectacular pictures from space, but theyre not detailed enough to help us in our search for life in the trillions of galaxies across the universe. If tens of percent of stars have planets that could resemble the ear
VOA标准英语2018年(十一月)
Authority say a gunman and another person are dead, two others were wounded today following a shooting at a medical center in Rino Nevada. While the incident is still being investigated the authority say a man entered the center for advance medicine
2013年NPR美国国家公共电台12月
VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. Im Bob Doughty. VOICE TWO: Jesse Sullivan was an electrical worker who lost both of his arms while working on power lines And Im Barbara Klein. This week, we will tell about an American
VOA慢速英语2009年（三）月
AS IT IS 2015-09-20 NASAs Astronauts Reach Halfway Point of Year in Space Right now, as you go about your business, two humans are passing above you in outer space. American astronaut Scott Kelly and Russian cosmonaut Mikhail Kornienko reached the ha
2015年VOA慢速英语(九)月
Volunteers Get Taste of Mars in Hawaii 志愿者在夏威夷体验火星 For generations, people have dreamed of traveling to Mars to explore Earth's closest planetary neighbor. NASA and other space agencies have announced plans to send people to the
2015年VOA慢速英语(三)月
AS IT IS 2016-02-26 Astronaut Scott Kelly Talks about His Year in Space For nearly a year, American astronaut Scott Kelly has been living and working at the International Space Station (ISS), with no running water. He told reporters Thursday that it
2016年VOA慢速英语(二)月
Nixon's China Visit Marked Turning Point in Sino-American Relations Nixon's trip to China was such a grand drama on the world stage that years later, it, indeed, became an opera. The historical record is much simpler: He arrived on February 21, 1972
VOA标准英语2012年(二月)
China successfully launches Shenzhou-11 manned spacecraft As the sun rose over Northwest China's Gobi dessert, Shenzhou 11 spacecraft blasted off into space, propelled by its Long March 2F carrier rocket at 7:30 am Monday morning. After its separatio
2016CRI中国国际广播电台
By Brian Wagner Miami 22 October 2007 NASA officials say possible rains and low clouds may force the delay of Tuesday's scheduled launch of the space shuttle Discovery. In Miami, VOA's Brian Wagner reports the shuttle is set to deliver a new module t
2007年VOA常速英语（十月）
VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. Im Bob Doughty. VOICE TWO: Jesse Sullivan was an electrical worker who lost both of his arms while working on power lines And Im Barbara Klein. This week, we will tell about an American s
2010年慢速英语(三)月
拓扑排序 topological sort 偏序 partical order 拓扑有序 topological order AOV网 activity on vertex network AOE网 activity on edge network 关键路径 critical path 匹配 matching 最大匹配
实用英语
The Perfect Mess In an interview with Michael McLaughlin published in The New Writers Handbook (2007), Eric Abrahamson, co-author of A Perfect Mess: The Hidden Benefits of Disorder, says Your mess is perfect when it reaches the point at which, if you
阅读空间
People are flocking to the central Florida coast for Friday's scheduled launch of the space shuttle Endeavour(奋进号) , the second to last launch of a shuttle as NASA brings the three-decade-old program to an end. The space agency is expecting aro
英语新闻
AS IT IS 2016-03-03 Kelly, Kornienko Land on Earth after Year in Space Scott Kelly and Mikhail Kornienko have their feet on the ground for the first time in 340 days. Riding in a Russian spacecraft, they made it back to Kazakhstan, along with a fello
2016年VOA慢速英语(三)月
The Australian Medical Association is appealing directly to the Prime Minister to stop a cut to the Medical Care rebate to short down the visits. From next Monday the rebate for consltations of less than 10 minutes will be cut by around 20 dollars. T
澳洲ABC新闻快递2015年
Topics: Ask an American: Saving the space program; point versus period versus dot; using no with a verb; all the same Words: vehicle astronaut orbit to hitch a ride to imply to stoke innovation golden era space exploration driven by to shift outlook
美语听力 English Cafe
Part 3. Compton Gamma Ray Observatory. Keywords. ailing observatory, orbit, gamma rays. Vocabulary. debris, thruster, gyroscope, bathe, stream from, Compton Gamma Observatory, Goddard Space Flight Center. Now listen to a news report, complete the new
Step by Step 3000 第二册
President Xi Jinping also says China advocates the building of a peaceful, secure, open and cooperative cyber space. Xi Jinping made the comment while attending the 8th annual US-China Internet Industry Forum, at the Microsoft headquarters in Redmond
2015CRI中国国际广播电台
In his book Cosmos, the late scientist Carl Sagan talks about the way in which the earth is regularly struck by material from outer space. These collisions with space debris can be minoras in a shooting star on a summer nightor amazingly destructive,
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