The second problem is that the sheer weight of the US in international affairs, though diminished nowadays, has nonetheless led to a corruption of the principles that should underpin a new climate-change treaty to succeed the Kyoto Protocol.
第二个问题是美国在国际事务上的分量虽然已有所下降，但仍足以破坏理应成为京都议定书之后的气候变化条约的基础的原则。