Barack Obama is right to visit the Copenhagen climate talks. The meeting will achieve less than was once hoped for, and Mr Obama's hands, to be sure, are tied by domestic politics. But his personal commitment is still valuable.
巴拉克•奥巴马(Barack Obama)出席哥本哈根气候会议乃是正确之举。此次会议的成果，将低于人们曾经的预期，奥巴马的手脚肯定也会受到国内政治因素的束缚。但他个人做出的承诺仍弥足珍贵。
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