单词：clapper valve
- clack发出咔嗒声
- clack valve瓣阀
单词：clapper valve 相关文章
U.S. President Barack Obama has chosen the Defense Department's head of intelligence to oversee the nation's 16 intelligence agencies. Retired Air Force General James Clapper is the president's choice to be the new Director of National Intelligence. 美
VOA双语新闻 2010年6月
If you have two hands, you cant help but applaud the original Clapper. First sold in 1985, it worked with a lamp or any other electric device. You plugged the Clapper into an outlet. Then you plugged your lamp into the Clapper. By clapping twice, you
365个英语简短小故事
Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文，请发贴到 听力原文收集区 ，您将会获得10到30积分的奖励! Thank you！
午后咖啡
AS IT IS 2016-02-13 America Faces Many Security Challenges 美国面临许多安全挑战 Nuclear weapons, terrorism and computer spying are problems for national security, say American intelligence officials. The officials say challenges and crises
2016年VOA慢速英语(二)月
President Barack Obama announces James Clapper as his choice to oversee the nation's 16 spy agencies as director of national intelligence, 05 Jun 2010 U.S. President Barack Obama has chosen the Defense Department's head of intelligence to oversee the
VOA标准英语2010年(六)月
During the Cold War, the U.S. military built an elaborate system to control the thousands of nuclear weapons in this country. There are many checks and balances, no officers who work with intercontinental ballistic missiles, nuclear armed aircraft, o
PBS访谈社会系列