单词：Basidiobolaceae
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By Jim Malone Washington 09 February 2007 Two more presidential candidates, Democrat Barack Obama and Republican Mitt Romney, will formally announce their entry into the 2008 race for the White House over the next few days. VOA National corresponden
2007年VOA标准英语（二月）
President Barack Obama says America's economy is in crisis but can be repaired. America's 44th president struck a determined, but pragmatic tone, on economic matters in his inaugural address. President Barack Obama delivers his inaugural address at
VOA标准英语2009年(一月)
Obama Calls for Action on Gun Violence Gunfire erupted on December 14 at Sandy Hook Elementary School, where a heavily armed young man shot and killed 20 children and several school administrators. The entire nation recoiled in grief and horror. Days
VOA标准英语2013年(一月)
President Barack Obama has now reached the halfway mark in his first 100 days in office, a traditional benchmark when new presidents are evaluated on their progress. Mr. Obama has laid out an ambitious agenda that has focused on reviving the weak U.
VOA标准英语2009年(三月)
60 测试新药安慰剂的疗效 DATE=6-21-01 TITLE=SCIENCE REPORT - Placebo Effect Study BYLINE=Nancy Steinbach (Start at 59
科技之光
By Jim Malone Washington 12 June 2008 A new public opinion poll shows Democrat Barack Obama leading Republican John McCain in the race for the White House by a margin of 47 to 41 percent. The Wall Street Journal-NBC News poll was conducted as the ge
VOA标准英语2008年（六月）