但是，尽管广受关注的多极世界秩序也许已经注定，但现实是就目前而言，解决全球挑战 — — 从气候变化到中东冲突 — — 的措施都需要美国的参与。
But, though the much-discussed multi-polar world order may well be in the cards, the reality is that, for now, efforts to address global challenges – from climate change to conflict in the Middle East – demand US engagement.