单词：cesium germanide
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[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
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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
The girl got up on the horse. It was a brown and white horse. It was a big horse. She sat on the horses back. She was taller than her father. She looked down at her father. Daddy, you are shorter than me, she said. Her daddy said, Yes, you are taller
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歌曲： Where Do You Run 艺人： D-Side 音乐星级： ★★★★★ 所属专辑： Stronger Together 发行年代： 2004 风格： Pop 介绍： D-Side与Boyzone、Westlife等同样来自於男生偶像超级梦工厂的爱尔兰，是个由Ryan ORian雷恩,ShaneCreevey夏恩、Derek Moran德瑞克，Dam
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Adrienne: I understand you recently rode a train from Milwaukee to Minneapolis. Was this the first time you ever rode a train? Vivian: No, I have been on a train many times as a young person but recently in the past 3 or 4 years I have ridden a train
原版英语对话1000个
Todd: Hey, Akane, the other day we were coming home on the bus and I got off the bus and I thought you were on the same bus as us, but when I started walking home, you weren't around. What happened? Akane: Well, it's kind of a funny story actually. I
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