在双边采取主动之前，有整整十年美国避免参与国际间处理气候变化的尝试，担心如果它采取了行动而中国按兵不动，世界就无法实现减排目标，美国的工业也会陷于不利之境。
This bilateral initiative comes on the heels of a decade in which America abstained from international efforts to address climate change, concerned that if it acts but China doesn’t, the world will fail to meet its emission-reduction targets and US industry will be disadvantaged.