We can imagine that if one decides to propose a new framework, it would be difficult to predict how long a consensus could be reached then, let alone to achieve a post-Kyoto agreement.

试想，如果撇开业已达成的基础另起炉灶，短期内就该谈判基础本身都恐难形成共识，更别提要就后京都安排达成协议了。