单词：principal radius of curvature
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[00:00.00] Uint 7 [00:02.90]Lesson 25 [00:06.14]New word and expression [00:10.08]manners [00:11.52]pl.礼貌 [00:12.96]Zak [00:14.18]n.扎克 [00:15.41]Epps [00:16.69]n.艾普斯 [00:17.97]principal [00:19.45]n.校长 [00:20.92]seat [00:22.24]n.座位
广州初中4A
Tina was going back to school for her third masters degree. She was a Special Education teacher, but she couldnt take her job anymore, so she had quit. The kids were out of control. There were too many of them in one classroom for her to manage effec
365个英语简短小故事
Grammar Girl here. Today were going to recall that the principal is indeed your pal, but well also see that a principal can be so much more. In this episode well talk about the various ways to use principlethats p-l-eand principalthats p-a-l. (These
英语语法 Grammar Girl
KUALA LUMPUR, March 24 (Xinhua) -- New analysis of satellite data suggested that missing Malaysia Airlines Flight MH370 had crashed in the southern Indian Ocean, Malaysian Prime Minister Najib Razak said on Monday. Najib released the sad news at a ha
英语新闻
Japan's Transportation Ministry has imposed a no-fly zone over a 20-mile radius around the badly damaged Fukushima Daiichi nuclear plant. A military spokesman says the fears of more radioactive particles leaking from the complex after a fire in three
2011年NPR美国国家公共电台3月
The Herdwick Shepherd, James Rebanks, is the latest of several generations to have tended flocks in the Lake District, but he now has a book and 45,000 Twitter followers entranced by the starkly beautiful scenes he photographs every day. Here he expl
英美文化
Moon 月球 Do you have any idea how big the moon is? 你知道月球有多大吗？ The moon's radius is 1737 kilometers. 月球的半径长1737千米。 This is just one fourth of our Earth. 它的半径仅仅是地球半径的四分之一。 The d
与美国小学生一起学英文第4册
RACHEL MARTIN, HOST: In North Carolina, more than 60,000 students are starting another week without school. Their districts are still taking stock of the damage caused by Hurricane Florence, and many of the students and teachers who evacuated are sti
2018年NPR美国国家公共电台9月
Like a Porsche 像保时捷那样 Jef Raskin's vision for the Macintosh was that it would be like a boxy carry-on suitcase, 杰夫拉斯金设想中的麦金塔电脑就像一只四四方方的手提箱， which would be closed by flipping up the key
乔布斯传
Have you ever considered the possibility that the sun will eventually burn out? Don and Yael discuss that sobering thought on this Moment of Science. [OUTSIDE INSECT SOUNDS] D: Wow, what a beautiful s
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HARI SREENIVASAN: As we reported yesterday, the nation's largest egg-producing state, Iowa, has declared a state of emergency following a major outbreak of the avian flu. Millions of chickens and turkeys there and in Wisconsin and Minnesota have been
PBS访谈健康系列
还记得孙燕姿那首红遍大江南北的《绿光》吗？翻越过前面山顶、层层白云，绿光在哪里？不知道有多少人跟小编一样，以为歌里的绿光只是对幸福的比喻。而其实在现实中，绿光是真实存在
实用英语
The analogy that is usually given for explaining the curvature of space is to try to imagine someone from a universe of flat surfaces, who had never seen a sphere, being brought to Earth. No matter how far he roamed across the planet's surface, he wo
万物简史
The Herdwick Shepherd, James Rebanks, is the latest of several generations to have tended flocks in the Lake District, but he now has a book and 45,000 Twitter followers entranced by the starkly beautiful scenes he photographs every day. Here he expl
阅读空间
BEIJING, Jan. 25 (Xinhua) -- China has set a goal of equipping at least half of the country's county-level administrative regions to monitor various contaminants and harmful ingredients in food by the end of 2013. A new work plan, released on Friday
英语新闻
The World Health Organization (WHO) warns against the indiscriminate(任意的无差别的) use of potassium iodide as a precaution against nuclear radiation. WHO is issuing this advisory following reports of people in Japan and elsewhere who are usi
英语新闻
1.Euro zone's top officials executively have talked for a whole week for new bailout programme for Greece to be worked out . Under the deal reached Monday, Greece must take measures to reform its economy inorder to find negotiations on the third mult
美联社新闻一分钟2015(七)月
Apple resisted licensing out the Macintosh operating system until 1994, 苹果一直拒绝把麦金塔的操作系统授权出去，直到1994年， when CEO Michael Spindler allowed two small companies, Power Computing and Radius, to make Macintosh
乔布斯传
Beijing expects to implement the pre-commercial service of the 5th generation mobile networks, or 5G, in key locations by 2020, according to a development plan on big data and cloud computing released by the municipal government. 北京市政府近日发
英语新闻