On climate change,Obama said the two leaders agreed on "a series

On climate change,Obama said the two leaders agreed on "a series of important new initiatives,"including the establishment of a joint clean energy research center.Obama said that "there can be no solution to that challenge without the efforts of both China and the United States."
【正确答案】：奥巴马说“只有两国共同努力才能应对这一挑战”。、原句是主从复合句，that引导的从句在句中作定语，原句中的there be句型是否定句，汉译时转为肯定的条件句，译为“只有.….才.……”更符合汉语的表达习惯。原句中solution是名词，汉译时转为动词“应对”。