单词：cesium hollow cathod
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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
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
Ooh ooh Ooh ooh I'm a dead man walking here That's the least of all my fears Ooh underneath the water It's not Alabama clay Gives my trembling hands away Ooh please forgive me father Ain't going back to Barton Hollow Devil gonna follow me 'ever I go
The Voice 美国好声音
The Legend of Sleepy Hollow by Washington Irving Today's story is called The Legend of Sleepy Hollow. It is about something strange that happened long ago in a valley called Sleepy Hollow. It was written by Washington Irving. The story is told by Dou
2015年VOA慢速英语(十)月
Stay alive Heaven holds a place for us tonight I am paralyzed Close your eyes Drive away the cloud that hides the light And leave the pain behind Dead alive find a way to bury all the lies Escape the hate inside Cause I dont want to fall or let you g
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