单词：cathode emission area
单词：cathode emission area 相关文章
By Lisa Schlein Geneva 29 June 2007 Former U.N. Secretary General Kofi Annan is launching a new organization to improve humanitarian assistance around the world. Mr. Annan says the new organization, called the Global Humanitarian Forum, will help peo
2007年VOA标准英语（六月）
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Batteries of the future need to deliver more energy, and they need to be smaller. Researchers at MIT think they have developed a technology that can, a
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By Nancy-Amelia Collins Bali, Indonesia 13 December 2007 The head of the United Nations Climate Change Conference is warning that a deadlock between the United States and the European Union over greenhouse gas emission targets may derail the conferen
VOA常速英语2007年（十二月）
At Least One-Third of Himalayan Ice to Disappear by 2100 At least one-third of the ice in the Himalayan Mountains will disappear by the end of this century because of rising temperatures, scientists said this week. This will threaten river flows that
VOA标准英语2019年(二月)
At Least One-Third of Himalayan Ice to Disappear by 2100 At least one-third of the ice in the Himalayan Mountains will disappear by the end of this century because of rising temperatures, scientists said this week. This will threaten river flows that
VOA标准英语2019年(二月)
At least one-third of the ice in the Himalayan Mountains will disappear by the end of this century because of rising temperatures, scientists said this week. This will threaten river flows that provide water resources for 1.9 billion people. Huge gla
2019年VOA慢速英语(二)月