Kremlin leaders are offering a positive assessment about the future of U.S.-Russian relations, but caution that a number of difficult issues continue to separate the two sides, particularly those involving missile defense.
俄罗斯领导人对未来的美俄关系给予正面评价，但是他们也对一些持续给美俄双方造成分歧的难题提出警告，尤其是那些涉及导弹防御的问题。
Russian President Vladimir Putin told visiting U.S. Secretary of State Condoleezza Rice and Defense Secretary Robert Gates that he considers a letter he recently received from President George W. Bush to be a serious document, which the Russian side has thoroughly analyzed.
俄罗斯总统普京对到访的美国国务卿赖斯和美国国防部长盖茨说，他最近收到美国总统布什的一封信，他把这封信看作是一个重要文件，俄罗斯方面对这封信进行了全面的分析。
Mr. Putin said if both sides are able to reach agreement on the letter's main points, it will be possible to say the U.S.-Russian dialogue i