Obama expressed "his deep regret regarding the study" and extended "an apology to all those affected," White House spokesman Robert Gibbs said in a statement.

奥巴马表达了“他针对这项研究的深深地遗憾”，并表示了“对所有的受感染者的歉意”，白宫新闻发言人罗伯特·吉布斯发表声明如是说。

youdao

Obama expressed surprise on winning the prize but said he accepted the honor as a call to action for nations to confront the challenges of the 21st century.

奥巴马表示的获奖感到意外，但表示，他接受了作为向国家呼吁采取行动以对付21世纪的挑战的荣誉。

youdao

Mr. Obama expressed support on Sunday for a proposal from Prime Minister Lars Lokke Rasmussen of Denmark to pursue a two-step process at the Copenhagen conference.

奥巴马上周末对丹麦首相拉斯穆森将哥本哈根峰会的目标一分为二的的提议表示了支持。

youdao

On Tuesday,President Obama expressed his sadness about her death.

VOA: special.2010.04.09

I have a lot to learn,". A senior U.S.official who attended the meeting said Mr.Obama expressed a desire to work with UNASUR nations to confront economic, environmental,and energy challenges.

VOA: standard.2009.04.18

During last year's presidential campaign, Barack Obama expressed a willingness to meet leaders of nations with which the United States has no official diplomatic relations, including Cuban President Raul Castro.

VOA: standard.2009.04.15

Despite the dire situation that he described, Obama expressed hope that the country would recover.

CNN: Obama calls for 'dramatic action'

During his Presidential campaign, Barack Obama expressed confidence that his penchant for diplomacy would change German minds.

WSJ: Same Old Berlin Wall

Mr Obama expressed confidence in his Attorney General, Eric Holder, who has come under fire for the phone-records seizure.

BBC: Obama tries to tame political tempests