单词：critical attenuation
单词：critical attenuation 相关文章
Our eyes are two of the most important things in our lives. We use them every second we are awake. They help keep us safe, recognize friends, and select things we like. It is possible to lead happy and healthy lives without being able to see, but it
常春藤生活英语
Situation Critical 十万火急 by Kevin Lustig In some jobs, danger can appear at any moment. In the blink of an eye, the routine can become perilous. This month, the National Geographic Channel shows us what happens when a normal situation becomes
常春藤解析英语
The UN has just issued a report saying that six million people in Myanmar need food right now. How critical is the situation? It's a real paradox, because in the same year that Cyclone Nargis devastated the, what had been the rice bowl of Myanmar, th
访谈录2009
And you know, along the way in this journey of discovery, I learned a lot. I learned a lot about science. But I also learned a lot about leadership. Now you think director has got to be a leader, you know, leader of, captain of the ship, and all that
名人励志英语演讲
In Houston, Flight director Kranz is trying to make sense of the barrage of information. I am completely surrounded with reports coming in that I dont fully understand, but frankly, problems are our business, and I thought we are going to solve these
国家地理2007年
Transmission Facilities Transmission facilities provide the communication paths that carry user and network control information between nodes in a network. In general, transmission facilities consist
电信英语
I-MAC isonchronous media access controller IDN integrated digital network IEC International Electrotechnical Commission Impairments Impairments is the (e.g., transmission channel and signal impairment
电信英语
高考英语阅读理解得分秘籍 在英语考试中，阅读理解往往是决定成败的关键，巧解阅读理解中关于作者意图、观点、态度的问题是在阅读理解中取胜的关键法宝。 作者观点态度题就是指针对作
英语学习方法
By Greg Flakus Houston 05 March 2008 Hillary Clinton made a stunning comeback in Tuesday's primaries and caucuses, winning decisively in Ohio and Rhode Island and coming out on top of a close race in Texas. John McCain won all four states, to clinch
VOA标准英语2008年（三月）
By Melinda Smith Washington 06 September 2007 In 2006, the World Health Organization issued a report that a critical shortage of doctors and nurses has contributed to severe health problems in Africa and parts of Asia.The report said at least four mi
2007年VOA标准英语（九月）
True, he had not the qualities of social humor or wit, but he was an example of indefatigable industry. 实际上，他天生没有幽默感，也不会说俏皮话，可他是这一行业不辞辛苦劳作的典范。 He came to his studies every mo
美国语文第六册
Scotch whiskey is said, by some, to have many magical qualities. Now, scientists in Scotland have discovered one more: it can be a weapon against polluted waste sites. A by-product of the spirit is 99.96 percent effective in cleaning contaminated gr
VOA标准英语2008年(十二月)
Im 30 years old, and there are several things that life has taught me that I want to share with you. Some of these things Ive known since I was young, some of these things I have learned recently. 我现在30岁了，我想和大家分享一下这些年
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In the Pacific state of Hawaii, U.S. President Barack Obama on Sunday told leaders of the 21 Asia Pacific Economic Cooperation economies that the region will be key to U.S. economic recovery. With much of the formal summit activity, including a worki
英语新闻
Im 30 years old, and there are several things that life has taught me that I want to share with you. Some of these things Ive known since I was young, some of these things I have learned recently. 我现在30岁了，我想和大家分享一下这些年
英语美文
By Scott Stearns Dakar 08 October 2009 Cameroon President Paul Biya (file photo) Authorities in Cameroon have closed a private FM radio station that has been broadcasting illegally from the capital for several months. The station was highly critical
VOA标准英语2009年(十月)
素材来源：《狗狗旅馆》 寄人篱下的姐弟俩为不能继续养自己的爱犬而烦恼，机缘巧合之下他们发现了一栋被废弃的旅馆，并结识了宠物店工作的戴夫和海瑟，他们四个一起联手，偷偷打造狗
英语口语