单词:essentially self-adjoint operator
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AS IT IS 2013-06-25 Washington State Debates Marijuana Measures From VOA Learning English, This is AS IT IS. Welcome back! Im Caty Weaver. Growing marijuana and marijuana use are illegal in the United States under federal law. However, eighteen state
From left: European Central Bank President Jean-Claude Trichet, the International Monetary Fund head Dominique Strauss-Kahn and German Finance Minister Wolfgang Schaeuble, following a meeting with German lawmakers in Berlin, 28 April 2010 U.S. stock
AS IT IS 2013-07-22 Apps for Apes: Orangutans Love the iPad Hello, and welcome to As It Is, our daily magazine show for people learning American English. Im Christopher Cruise in Washington. Today on the program, we visit with some apes who really li
AS IT IS 2013-05-03 Washington State Debates Marijuana Measures From VOA Learning English, This is AS IT IS. Welcome back! Im Caty Weaver. Growing marijuana and marijuana use are illegal in the United States under federal law. However, eighteen state
AS IT IS - Efforts in Zimbabwe to write a new constitution From VOA Learning English, welcome to AS IT IS. Im your host Mario Ritter. All over the world, people have a desire to have their voice heard in their communities. Today we report on efforts
Yemen Unrest Deepens, Downward Spiral Spreads Yemeni government troops in Sana'a are again fighting members of the Hashid tribe, just one of several forces, including militants and anti-government protesters, seeking to oust President Ali Abdullah Sa
The chair of the US Joint Chiefs of Staff says a no-fly zone is now in place over the Libyan rebel stronghold of Benghazi. But as NPR's Jennifer Ludden reports, he admits the US and its allies could be in for a long haul. Although President Obama has
Alzheimer's disease or AD is an illness that seriously affects senior citizens. It causes memory loss, and patients may even gradually lose some of their basic physical abilities. But now researchers in the U.S. are using technology to reduce memory
As Russia continues to raise its natural gas prices to Ukraine, some people are looking to American gas as a way to ease Europe's energy dependence on Russia. But it's a solution that's still several years off. In their home near Kyiv, Svetlana Kules
The polls have now closed across Iran after a day that saw a massive number of Iranians cast their votes for president. NPR's Mike Shuster reports from Tehran. From early in the morning when the polls opened until late at night, Iranians besieged th
Mexico, Canada Blame US for Unfairness in Trade 墨西哥与加拿大共同指责美国在贸易上的不公平 Boosting Mexican-Canadian trade and strong support for the North America Free Trade Agre
An industrial venture once celebrated as a symbol of reconciliation between the two Koreas may be endangered by a sharpening dispute between the two sides. North Korea is essentially tearing up the agreements that make the zone run. North Korea's of
MARY LOUISE KELLY, HOST: Now, it's been a rough few days for Democrats, too. They are trying to rebuild and win elections, including two gubernatorial races next week. And yet the 2016 Democratic primary is a wound that just can't seem to heal. Donna
美国天然气现在还不能帮助欧洲 As Russia continues to raise its natural gas prices to Ukraine, some people are looking to American gas as a way to ease Europe's energy dependence on Russia. But it's a solution that's still several years o
From VOA Learning English, This is AS IT IS. Welcome back! Im Caty Weaver. Growing marijuana and marijuana use are illegal in the United States under federal law. However, eighteen states and the nations capital, Washington, DC, permit the use of mar
JEFFREY BROWN: And we check in again with two people who've helped us keep up with the continuing crisis. Arjun Makhijani is an engineer special -- engineer specializing in nuclear fusion. He's the president of the Institute for Energy and Environmen
By Benjamin Sand Analysts say a planned re-alignment of U.S. military personnel abroad does not reflect a lessening of Washington's commitment to stability in Asia, but some individual countries in th
The conference was cohosted by Chongyang Institute for Financial Studies at Renmin University and the Carnegie Endowment for International Peace. Former Chinese State Councilor Dai Bingguo. China and the US have neither dispute over even one inch of
Alzheimer's disease or AD is an illness that seriously affects senior citizens. It causes memory loss, and patients may even gradually lose some of their basic physical abilities. But now researchers in the U.S. are using technology to reduce memory
JUDY WOODRUFF: We get more on today's announcement from Washington Post reporter Greg Jaffe. Greg, how did he get to this decision? GREG JAFFE, The Washington Post: You know, in the spring, they started a review to decide what they were going to do.