美国国务卿鲁比奥：当前是叙利亚问题的历史性机遇，但前路漫长。

Core Viewpoint - The current situation presents a historic opportunity regarding the Syrian issue, but the path ahead is expected to be long and challenging [1] Group 1 - The U.S. Secretary of State, Rubio, emphasizes the significance of the current moment in addressing the Syrian crisis [1] - There is an acknowledgment of the complexities and difficulties that lie ahead in resolving the Syrian issue [1]