当本周内被问及是否会对此做出承诺时，奥巴马的首席谈判代表，精明的乔纳森·潘兴说，美国仍然在寻求科学证据。

Asked this week if he's committed to it, Obama's slick chief negotiator, Jonathan Pershing, said the US was still looking at the science.

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同时，巴拉克将因为膝盖发炎缺席德国队周三在盖尔森基兴的友谊赛。

Michael Ballack will be missing for the Germans in that friendly fixture on Wednesday in Gelsenkirchen after suffering inflammation to the back of a knee.

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上周六，在盖尔森基兴进行的英葡四分之一决赛中，双方均无进球，之后，葡萄牙在点球大战中击败英格兰，这让寄希望于英格兰队摘得本届世界杯冠军的球迷们痛苦不堪。

Portugal beat England on penalties after Saturday's goalless quarter-final in Gelsenkirchen, causing misery for England supporters hoping their team could become world champions.

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