A clear, public commitment by Mr Bush at the G8 summit in St Petersburg next weekend offers the best, and probably last, opportunity to save the Doha round.

• 布什先生在下周圣彼得堡的8国首脑峰会上发表一个清晰的政治声明，这也许是拯救多哈回合最好的也是最后的机会。