单词：phosphorus octabromotrichloride
单词：phosphorus octabromotrichloride 相关文章
Were on the job with the five most popular songs in the Billboard Hot 100 Pop Singles chart, for the week ending October 21, 2017. We have some excitement this week, as a new remix results in a huge rebound for a song that was already a hit. Lets ope
VOA标准英语2017年(10月)
A: I have been getting headaches almost every day lately. B: Have you just started getting a lot of headaches? A: I never had very many headaches before, but the last few weeks I have been getting a lot of them. B: Have you had any unusually stressfu
英语情景对话-健康
A: I have had some really horrible headaches lately. B: How long have your headaches been going on? A: I get headaches occasionally, but they have been really bad lately. B: Any unusual amounts of stress in your life going on right now? A: I am getti
英语情景对话-健康
A: I have been having a lot of headaches lately. B: Have you been having these headaches for a long time? A: I have had headaches my whole life, but they have been getting worse lately. B: Have you been under a lot of stress lately? A: Ive been under
英语情景对话-健康
The little splints of wood which we call matches are made out of deal or pine wood which has been soaked in melted paraffin wax to make it burn more easily. 这种被我们称之为火柴的薄木片由欧洲赤松（松树）制成, 在液体的石蜡
英国学生科学读本
Have you ever had a problem getting a match to light? If so, you might be using the wrong type of match. There are actually two different types of matches: safety matches and strike-anywhere matches. 以前你点燃火柴时有没有点不着的时候呢
2018年NPR美国国家公共电台2月
By Caty Weaver Broadcast: October 3, 2004 (THEME) VOICE ONE: I'm Faith Lapidus. VOICE TWO: And I'm Steve Ember with People in America in VOA Special English. Today we tell about the world's most famous doctor for children, Benjamin Spock. (THEME) VOI
名人轶事
Grammar Girl here. Today's topic is words that can get you into trouble. Guest-writer Bonnie Trenga writes: Once upon a time, some mistaken citizens stood up for American principals, p-r-i-n-c-i-p-a-l-s. Across the Atlantic, a nutty queen sat on her
英语语法 Grammar Girl
This is Scientific American's 60-Second Science, I'm Christopher Intagliata. Got a minute? Life on earth requires six basic ingredientscarbon, hydrogen, nitrogen, oxygen, sulfur and phosphorus. Those six elements are the building blocks for DNA and R
Scientific American(十二)月
This is the VOA Special English Agriculture Report. Hogs at an Ohio farm Research shows that waste from pigs that are fed a special kind of corn may help a farmer's crops. And it also may help the environment. Any farmer who raises swine knows that
VOA慢速英语2008年（八）月
By Peter Fedynsky Moscow 18 July 2007 Officials in Ukraine are assessing the damage of a train crash in western Ukraine that sent huge clouds of burning phosphorus billowing into the air. The accident, which took place Monday, is raising health conce
2007年VOA标准英语（七月）
By Tendai Maphosa London 11 January 2008 A new study reveals that more African doctors and nurses are working abroad than at home, which it says is contributing to the worsening shortage of health care professionals in Africa. From London, Tendai Map
VOA标准英语2008年（一月）
Ethiopia will accomplish the construction at any cost whether donors continue funds or not. The giant Gibe III dam, now being built on the Omo River in southwestern Ethiopia is a boon for some, a problem for others. Supporters say it will provide ele
VOA标准英语2010年(九)月
A: Hello, I need to come in and see the doctor. B: Are you scheduling a check-up, or are you ill? A: I have really itchy skin and think I may have to have it looked at. B: Have you been feeling any joint aches with that rash? A: No, but I have a low
英语情景对话-健康
MARY LOUISE KELLY, HOST: Summertime brings algae blooms to many parts of the country - those mats of bright green organisms that can blanket waterways. In places like Florida's Lake Okeechobee, the blooms hurt tourism. They kill fish. They threaten w
2018年NPR美国国家公共电台7月
The commercial potential for the stuffwhich soon became known as phosphorus, from Greek and Latin roots meaning light bearingwas not lost on eager businesspeople, but the difficulties of manufacture made it too costly to exploit. An ounce of phosphor
万物简史
German doctors who have examined jailed Ukrainian opposition leader Yulia Tymoshenko have appealed to the president to let her be moved abroad for treatment. Karl Einhaeupl, head of Berlin's Charite university hospital, told reporters Friday that his
英语新闻
By Weaver Carolyn New York 09 April 2007 Watch Global Medical Relief Fund A tiny organization based in New York City is making big changes in the lives of a few lucky children from around the world. The ten-year-old Global Medical Relief Fund has he
2007年VOA标准英语（四月）
Matches Striking matches, on this Moment of Science. Have you ever had a problem getting a match to light? If so, you might be using the wrong type of match. There are actually two different types of matches: safety matches and strike-anywhere matche
英语听力文摘 English Digest
台湾籍旅美老师今天交给我们的句子是： We'll get up close with prototypes in new categories like 3D printing, robotics, smart home sensors. And wellsome things that don't even have a category yet. 我们会接近各种新科技的原型
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