单词：cesium sillcofluoride
单词：cesium sillcofluoride 相关文章
[00:06.37]The United States has a new official clock. [00:10.95]The clock began operating late last year in the American city of Boulder,Colorado. [00:18.39]Experts say the new clock is so exact that it will neither gain nor lose so much as one secon
美国英语听力80篇
Youve given some thought to oxygen, carbon, uranium. But youve probably never mused about the element ytterbium, symbol Yb. A new study by scientists at the National Institute of Standards and Technology, or NIST, says that ytterbium could find a rol
Scientific American(八)月
She moved in to the house next door 她搬到隔壁的房子里 Said she'd never been in love before 说她从来没有谈过恋爱 Tried the best she could to hide herself away 试着最好的把自己隐藏起来 But every time she turned the light
音乐天堂
She moved in to the house next door Said she'd never been in love before Tried the best she could to hide herself away But every time she turned the lights down low He thought he heard a voice calling out so slow Come and take me away from all this p
英文好歌推荐-百听不厌的英文歌曲
A cluster of villages in China's Guizhou province has been plagued by an outbreak of disease that damages teeth and bones. Now, a new study by Chinese and American researchers puts the blame on polluted coal burned in home fireplaces. In small quanti
VOA标准英语2010年(十)月
今天我们要学的词是 fluoride. Fluoride 氟化物。The U.S. government is lowering the recommended amount of fluoride added to drinking water for the first time in more than 50 years. 美国政府50多年来首次降低饮用水建议添加的氟
英语单词荟萃