Mr. Obama and Mr. Medvedev smiled and whispered with each other as they sat side by side signing the treaty. Mr.

当奥巴马先生与梅德韦杰夫先生肩并肩地坐在一直签署该条约时，两人面带笑容并进行亲密的交谈。

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Mr.Obama smiled and joked throughout the forum,and earlier, as he toured the community college's wind turbine lab.

VOA: standard.2010.01.22

Obama smiled through the attacks, but he was less generous with his praise than he'd been during their previous meeting in Mississippi.

BBC: McCain's jabs fall short of Obama

Obama smiled, apparently recognizing the error, then tried to follow along.

NEWYORKER: No More Mr. Nice Guy